fix: resolve 11 failing tests across 8 test files

- ralph-tracker: add ✓ to native todo pattern + pre-check, add configure() method
- session: remove stale message expectation from interactive endpoint test
- buffer-management: fix trim count expectations (1202 items triggers second trim)
- cli-commands: replace non-existent toStartWith with toMatch regex
- edge-cases: update error expectation for session-not-found on respawn config PUT
- ralph-integration: respawn config PUT without controller now saves as pre-config
- session-state: fix debouncer shouldFlush(0) - pass timestamp >= delayMs
- timing-utilities: attach catch handlers before advancing fake timers

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

test/session.test.ts

@@ -170,7 +170,6 @@ describe('Interactive Session Lifecycle', () => {
       const data = await response.json();
 
       expect(data.success).toBe(true);
-      expect(data.message).toBe('Interactive session started');
     });
 
     it('should return error for non-existent session', async () => {