fix(ci): update golangci-lint exclusions and increase Windows timeout

- Add daemon_autostart.go, doctor/fix/sync_branch.go to G304 exclusions
- Add setup.go to G306 exclusions (config files need 0644)
- Add gate.go, gate_discover.go to G204 exclusions (gh/gt CLI calls)
- Add misspell exclusion for "cancelled" in gate.go (matches GitHub API)
- Increase Windows test timeout to 30m (was timing out at 20m)

These exclusions complement the #nosec annotations already in the code.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.github/workflows/ci.yml

@@ -64,7 +64,7 @@ jobs:
           # Windows: full test suite, no race detector (slower on Windows)
           - os: windows-latest
             coverage: false
-            test-flags: '-v -short -timeout=20m'
+            test-flags: '-v -short -timeout=30m'
     steps:
       - uses: actions/checkout@v6