feat(phase-36): automatic Tempo time tracking via workflow buttons + fix campaign test management

- Add red_started_at/blue_started_at timing fields to Test model with Alembic migration

- Modify workflow transitions to auto-create integrity-hashed worklogs: Start Execution records red_started_at, Submit to Blue Team stops Red timer and creates worklog then starts Blue timer, Submit for Review stops Blue timer and creates worklog

- Auto-sync worklogs to Tempo when test has a Jira link

- Add LiveTimer component showing real-time elapsed counter during active phases

- Clear timing fields on test reopen

- Fix campaign test management: replace broken navigate-to-tests flow with AddTestToCampaignModal that lets users search and add existing tests directly from the campaign detail page

frontend/src/types/models.ts

@@ -86,6 +86,10 @@ export interface Test {
   blue_validation_status: ValidationStatus | null;
   blue_validation_notes: string | null;
 
+  // Phase timing fields (for automatic Tempo worklogs)
+  red_started_at: string | null;
+  blue_started_at: string | null;
+
   // Remediation fields
   remediation_steps: string | null;
   remediation_status: string | null;