Fix framework bugs found during OTA testing ...

- DevTools: guard against empty sql_queries array before accessing last index
- RouterImplementation: skip empty route var names in POST routing
- CallControl: skip empty route var names when building action params
- Update .gitignore to exclude Cache, Logs, and firmwares dirs

Phase 5: Code quality and tech debt (side effects, dedup, dead code, config extraction, log security)

init framework