fix: unconditionally register speech services to prevent ServiceContainer crashes on empty init

chore: cleanup test scripts, secure deployment script, and implement Voice/TTS frontend refinements ...

- Removed all temporary root Python test scripts
- Secured remote_deploy.sh credentials using environment variables
- Added data/audio payloads directory to .gitignore
- Added automatic DB migration script (migrate.py) via uvicorn lifespan
- Applied major refactors to UI Voice Chat, Session handling, and unified React API configs
- Updated models and dependencies natively syncing with Nginx proxy features

Refactor STT model selection to dropdown, add YAML config import/export, and refine Voice/Coding Assistant UI

feat: Add new session UI, token counter, load history, and session isolation

refactor the coding workspace && support larger code refactoring request

add go-to-production code

enable OIDC

refactor faiss_store

support code chat and some faaiss db refactor to support tag filter

refactor the service container

add some logic in workspace

introduce gcloud tts

add demo code & cors enabled & document the apis

fix typo

introduce stt endpoint

refactor the routes api to be more modularized

refactor the integration test but tts is broken

refactor retriever

refactor the services to be plugable

fine-tune the vector store for extension

import real gemini embeddings

introduce the yaml for configuration

fix typo

refactor db creation & centralize the config.py

refactor

refactor code

add dspy

Refactor core structure and add new RAG modules