feat(#37-41): Add domains, ideas, relationships, agents, widgets schema

Schema additions for issues #37-41:

New models:
- Domain (#37): Life domains (work, marriage, homelab, etc.)
- Idea (#38): Brain dumps with pgvector embeddings
- Relationship (#39): Generic entity linking (blocks, depends_on)
- Agent (#40): ClawdBot agent tracking with metrics
- AgentSession (#40): Conversation session tracking
- WidgetDefinition (#41): HUD widget registry
- UserLayout (#41): Per-user dashboard configuration

Updated models:
- Task, Event, Project: Added domainId foreign key
- User, Workspace: Added new relations

New enums:
- IdeaStatus: CAPTURED, PROCESSING, ACTIONABLE, ARCHIVED, DISCARDED
- RelationshipType: BLOCKS, BLOCKED_BY, DEPENDS_ON, etc.
- AgentStatus: IDLE, WORKING, WAITING, ERROR, TERMINATED
- EntityType: Added IDEA, DOMAIN

Migration: 20260129182803_add_domains_ideas_agents_widgets

apps/api/src/activity/dto/query-activity-log.dto.ts

@@ -0,0 +1,56 @@
+import { ActivityAction, EntityType } from "@prisma/client";
+import {
+  IsUUID,
+  IsEnum,
+  IsOptional,
+  IsInt,
+  Min,
+  Max,
+  IsDateString,
+} from "class-validator";
+import { Type } from "class-transformer";
+
+/**
+ * DTO for querying activity logs with filters and pagination
+ */
+export class QueryActivityLogDto {
+  @IsUUID("4", { message: "workspaceId must be a valid UUID" })
+  workspaceId!: string;
+
+  @IsOptional()
+  @IsUUID("4", { message: "userId must be a valid UUID" })
+  userId?: string;
+
+  @IsOptional()
+  @IsEnum(ActivityAction, { message: "action must be a valid ActivityAction" })
+  action?: ActivityAction;
+
+  @IsOptional()
+  @IsEnum(EntityType, { message: "entityType must be a valid EntityType" })
+  entityType?: EntityType;
+
+  @IsOptional()
+  @IsUUID("4", { message: "entityId must be a valid UUID" })
+  entityId?: string;
+
+  @IsOptional()
+  @IsDateString({}, { message: "startDate must be a valid ISO 8601 date string" })
+  startDate?: Date;
+
+  @IsOptional()
+  @IsDateString({}, { message: "endDate must be a valid ISO 8601 date string" })
+  endDate?: Date;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt({ message: "page must be an integer" })
+  @Min(1, { message: "page must be at least 1" })
+  page?: number;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt({ message: "limit must be an integer" })
+  @Min(1, { message: "limit must be at least 1" })
+  @Max(100, { message: "limit must not exceed 100" })
+  limit?: number;
+}