feat: Add remote sync for project clones

Fetch remote changes before agents start working so they build on
up-to-date code. Adds ProjectSyncManager with git fetch + ff-only
merge of defaultBranch, integrated into phase dispatch to sync
before branch creation.

- Schema: lastFetchedAt column on projects table (migration 0029)
- Events: project:synced, project:sync_failed
- Phase dispatch: sync all linked projects before creating branches
- tRPC: syncProject, syncAllProjects, getProjectSyncStatus
- CLI: cw project sync [name] --all, cw project status [name]
- Frontend: sync button + ahead/behind badge on projects settings

apps/server/trpc/context.ts

@@ -25,6 +25,7 @@ import type { CoordinationManager } from '../coordination/types.js';
 import type { BranchManager } from '../git/branch-manager.js';
 import type { ExecutionOrchestrator } from '../execution/orchestrator.js';
 import type { PreviewManager } from '../preview/index.js';
+import type { ProjectSyncManager } from '../git/remote-sync.js';
 
 // Re-export for convenience
 export type { EventBus, DomainEvent };
@@ -79,6 +80,8 @@ export interface TRPCContext {
   chatSessionRepository?: ChatSessionRepository;
   /** Review comment repository for inline review comments on phase diffs */
   reviewCommentRepository?: ReviewCommentRepository;
+  /** Project sync manager for remote fetch/sync operations */
+  projectSyncManager?: ProjectSyncManager;
   /** Absolute path to the workspace root (.cwrc directory) */
   workspaceRoot?: string;
 }
@@ -110,6 +113,7 @@ export interface CreateContextOptions {
   conversationRepository?: ConversationRepository;
   chatSessionRepository?: ChatSessionRepository;
   reviewCommentRepository?: ReviewCommentRepository;
+  projectSyncManager?: ProjectSyncManager;
   workspaceRoot?: string;
 }
 
@@ -144,6 +148,7 @@ export function createContext(options: CreateContextOptions): TRPCContext {
     conversationRepository: options.conversationRepository,
     chatSessionRepository: options.chatSessionRepository,
     reviewCommentRepository: options.reviewCommentRepository,
+    projectSyncManager: options.projectSyncManager,
     workspaceRoot: options.workspaceRoot,
   };
 }