fix: add railway.json to override start command to clawlink

feat: integrate clawbridge into clawlink as embedded service (Scheme C)

clawbridge: harden zene command provider reliability

docs: add session-worker-pool flow and finalize pool-based bridge

feat: add clawops runtime and clawbridge service for copilot sdk flow

chore(qq): use generic fallback auto-reply text

fix(qq): use QQBot token for outbound app-secret auth

feat(qq): auto-reply when no operator connected

chore(qq): warn when inbound event has no operator

fix(qq): align ws handshake headers and intents

fix(qq): align ws auth flow with official qqbot plugin

fix(qq): use QQBot identify token with app access token

chore(qq): log websocket close code and reason

fix(ws): install rustls crypto provider for wss

fix(qq): enable websocket TLS support