fix(#196): fix race condition in job status updates

Implemented optimistic locking with version field and SELECT FOR UPDATE
transactions to prevent data corruption from concurrent job status updates.

Changes:
- Added version field to RunnerJob schema for optimistic locking
- Created migration 20260202_add_runner_job_version_for_concurrency
- Implemented ConcurrentUpdateException for conflict detection
- Updated RunnerJobsService methods with optimistic locking:
  * updateStatus() - with version checking and retry logic
  * updateProgress() - with version checking and retry logic
  * cancel() - with version checking and retry logic
- Updated CoordinatorIntegrationService with SELECT FOR UPDATE:
  * updateJobStatus() - transaction with row locking
  * completeJob() - transaction with row locking
  * failJob() - transaction with row locking
  * updateJobProgress() - optimistic locking
- Added retry mechanism (3 attempts) with exponential backoff
- Added comprehensive concurrency tests (10 tests, all passing)
- Updated existing test mocks to support updateMany

Test Results:
- All 10 concurrency tests passing ✓
- Tests cover concurrent status updates, progress updates, completions,
  cancellations, retry logic, and exponential backoff

This fix prevents race conditions that could cause:
- Lost job results (double completion)
- Lost progress updates
- Invalid status transitions
- Data corruption under concurrent access

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/api/src/activity/activity.service.ts

@@ -1,6 +1,6 @@
 import { Injectable, Logger } from "@nestjs/common";
 import { PrismaService } from "../prisma/prisma.service";
-import { ActivityAction, EntityType, Prisma } from "@prisma/client";
+import { ActivityAction, EntityType, Prisma, ActivityLog } from "@prisma/client";
 import type {
   CreateActivityLogInput,
   PaginatedActivityLogs,
@@ -20,7 +20,7 @@ export class ActivityService {
   /**
    * Create a new activity log entry
    */
-  async logActivity(input: CreateActivityLogInput) {
+  async logActivity(input: CreateActivityLogInput): Promise<ActivityLog> {
     try {
       return await this.prisma.activityLog.create({
         data: input as unknown as Prisma.ActivityLogCreateInput,
@@ -167,7 +167,7 @@ export class ActivityService {
     userId: string,
     taskId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -186,7 +186,7 @@ export class ActivityService {
     userId: string,
     taskId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -205,7 +205,7 @@ export class ActivityService {
     userId: string,
     taskId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -224,7 +224,7 @@ export class ActivityService {
     userId: string,
     taskId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -238,7 +238,12 @@ export class ActivityService {
   /**
    * Log task assignment
    */
-  async logTaskAssigned(workspaceId: string, userId: string, taskId: string, assigneeId: string) {
+  async logTaskAssigned(
+    workspaceId: string,
+    userId: string,
+    taskId: string,
+    assigneeId: string
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -257,7 +262,7 @@ export class ActivityService {
     userId: string,
     eventId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -276,7 +281,7 @@ export class ActivityService {
     userId: string,
     eventId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -295,7 +300,7 @@ export class ActivityService {
     userId: string,
     eventId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -314,7 +319,7 @@ export class ActivityService {
     userId: string,
     projectId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -333,7 +338,7 @@ export class ActivityService {
     userId: string,
     projectId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -352,7 +357,7 @@ export class ActivityService {
     userId: string,
     projectId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -366,7 +371,11 @@ export class ActivityService {
   /**
    * Log workspace creation
    */
-  async logWorkspaceCreated(workspaceId: string, userId: string, details?: Prisma.JsonValue) {
+  async logWorkspaceCreated(
+    workspaceId: string,
+    userId: string,
+    details?: Prisma.JsonValue
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -380,7 +389,11 @@ export class ActivityService {
   /**
    * Log workspace update
    */
-  async logWorkspaceUpdated(workspaceId: string, userId: string, details?: Prisma.JsonValue) {
+  async logWorkspaceUpdated(
+    workspaceId: string,
+    userId: string,
+    details?: Prisma.JsonValue
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -399,7 +412,7 @@ export class ActivityService {
     userId: string,
     memberId: string,
     role: string
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -413,7 +426,11 @@ export class ActivityService {
   /**
    * Log workspace member removed
    */
-  async logWorkspaceMemberRemoved(workspaceId: string, userId: string, memberId: string) {
+  async logWorkspaceMemberRemoved(
+    workspaceId: string,
+    userId: string,
+    memberId: string
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -427,7 +444,11 @@ export class ActivityService {
   /**
    * Log user profile update
    */
-  async logUserUpdated(workspaceId: string, userId: string, details?: Prisma.JsonValue) {
+  async logUserUpdated(
+    workspaceId: string,
+    userId: string,
+    details?: Prisma.JsonValue
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -446,7 +467,7 @@ export class ActivityService {
     userId: string,
     domainId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -465,7 +486,7 @@ export class ActivityService {
     userId: string,
     domainId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -484,7 +505,7 @@ export class ActivityService {
     userId: string,
     domainId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -503,7 +524,7 @@ export class ActivityService {
     userId: string,
     ideaId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -522,7 +543,7 @@ export class ActivityService {
     userId: string,
     ideaId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,
@@ -541,7 +562,7 @@ export class ActivityService {
     userId: string,
     ideaId: string,
     details?: Prisma.JsonValue
-  ) {
+  ): Promise<ActivityLog> {
     return this.logActivity({
       workspaceId,
       userId,