feat: unify 3 bot services into single process

- Add UNIFIED_MODE flag (default on, disable with UNIFIED_MODE=0)
- Register all 3 Discord bots in one process (claude, codex, review)
- Load all registered groups regardless of agent_type (codex/owner priority)
- Start credential proxy and container cleanup at unified startup
- shouldServiceProcessChat returns true in unified mode
- Add findChannelByName for role-based response routing
- Backward compatible: UNIFIED_MODE=0 restores per-service behavior

src/session-commands.test.ts

@@ -234,23 +234,6 @@ describe('handleSessionCommand', () => {
     );
   });
 
-  it('handles authorized /deploy-complete without invoking the agent', async () => {
-    const deps = makeDeps();
-    const result = await handleSessionCommand({
-      missedMessages: [makeMsg('/deploy-complete')],
-      isMainGroup: true,
-      groupName: 'test',
-      triggerPattern: trigger,
-      timezone: 'UTC',
-      deps,
-    });
-    expect(result).toEqual({ handled: true, success: true });
-    expect(deps.finalizeDeployment).toHaveBeenCalledTimes(1);
-    expect(deps.runAgent).not.toHaveBeenCalled();
-    expect(deps.advanceCursor).toHaveBeenCalledWith('100');
-    expect(deps.sendMessage).toHaveBeenCalledWith('Deployment finalized.');
-  });
-
   it('handles authorized /review without invoking the agent', async () => {
     const deps = makeDeps({
       markReviewReady: vi