feat(#93): implement agent spawn via federation

Implements FED-010: Agent Spawn via Federation feature that enables
spawning and managing Claude agents on remote federated Mosaic Stack
instances via COMMAND message type.

Features:
- Federation agent command types (spawn, status, kill)
- FederationAgentService for handling agent operations
- Integration with orchestrator's agent spawner/lifecycle services
- API endpoints for spawning, querying status, and killing agents
- Full command routing through federation COMMAND infrastructure
- Comprehensive test coverage (12/12 tests passing)

Architecture:
- Hub → Spoke: Spawn agents on remote instances
- Command flow: FederationController → FederationAgentService →
  CommandService → Remote Orchestrator
- Response handling: Remote orchestrator returns agent status/results
- Security: Connection validation, signature verification

Files created:
- apps/api/src/federation/types/federation-agent.types.ts
- apps/api/src/federation/federation-agent.service.ts
- apps/api/src/federation/federation-agent.service.spec.ts

Files modified:
- apps/api/src/federation/command.service.ts (agent command routing)
- apps/api/src/federation/federation.controller.ts (agent endpoints)
- apps/api/src/federation/federation.module.ts (service registration)
- apps/orchestrator/src/api/agents/agents.controller.ts (status endpoint)
- apps/orchestrator/src/api/agents/agents.module.ts (lifecycle integration)

Testing:
- 12/12 tests passing for FederationAgentService
- All command service tests passing
- TypeScript compilation successful
- Linting passed

Refs #93

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

docs/M6-NEW-ISSUES-TEMPLATES.md

@@ -121,7 +121,7 @@ Update TurboRepo configuration to include orchestrator in build pipeline.
 ## Acceptance Criteria
 
 - [ ] turbo.json updated with orchestrator tasks
-- [ ] Build order: packages/* → coordinator → orchestrator → api → web
+- [ ] Build order: packages/\* → coordinator → orchestrator → api → web
 - [ ] Root package.json scripts updated (dev:orchestrator, docker:logs)
 - [ ] `npm run build` builds orchestrator
 - [ ] `npm run dev` runs orchestrator in watch mode
@@ -164,7 +164,7 @@ Spawn Claude agents using Anthropic SDK.
 ```typescript
 interface SpawnAgentRequest {
   taskId: string;
-  agentType: 'worker' | 'reviewer' | 'tester';
+  agentType: "worker" | "reviewer" | "tester";
   context: {
     repository: string;
     branch: string;
@@ -851,6 +851,7 @@ Load testing and resource monitoring.
 ## Technical Notes
 
 Acceptable limits:
+
 - Agent spawn: < 10 seconds
 - Task completion: < 1 hour (configurable)
 - CPU: < 80%