fix: resolve integration issues after phase branch merges

- Register errandProcedures in appRouter (was defined but never spread)
- Fix nullable projectId guard in errand delete/abandon procedures
- Add sendUserMessage stub to MockAgentManager in headquarters and
  radar-procedures tests (AgentManager interface gained this method)
- Add missing qualityReview field to Initiative fixture in file-io test
  (schema gained this column from the quality-review phase)
- Cast conflictFiles access in CLI errand resolve command

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/server/test/unit/radar-procedures.test.ts

@@ -69,6 +69,7 @@ class MockAgentManager implements AgentManager {
   async delete(): Promise<void> { throw new Error('Not implemented'); }
   async dismiss(): Promise<void> { throw new Error('Not implemented'); }
   async resumeForConversation(): Promise<boolean> { return false; }
+  async sendUserMessage(): Promise<void> { throw new Error('Not implemented'); }
 }
 
 // =============================================================================