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/cli-commands.test.ts

@@ -348,7 +348,7 @@ describe('CLI Command Parsing', () => {
     it('should format properly', () => {
       const help = generateHelp('test', 'Test command', ['--flag']);
       const lines = help.split('\n');
-      expect(lines[0]).toStartWith('Usage:');
+      expect(lines[0]).toMatch(/^Usage:/);
     });
   });