chore: rename quicproquo → quicprochat in docs, Docker, CI, and packaging

Rename all project references from quicproquo/qpq to quicprochat/qpc
across documentation, Docker configuration, CI workflows, packaging
scripts, operational configs, and build tooling.

- Docker: crate paths, binary names, user/group, data dirs, env vars
- CI: workflow crate references, binary names, artifact names
- Docs: all markdown files under docs/, SDK READMEs, book.toml
- Packaging: OpenWrt Makefile, init script, UCI config (file renames)
- Scripts: justfile, dev-shell, screenshot, cross-compile, ai_team
- Operations: Prometheus config, alert rules, Grafana dashboard
- Config: .env.example (QPQ_* → QPC_*), CODEOWNERS paths
- Top-level: README, CONTRIBUTING, ROADMAP, CLAUDE.md

sdks/python/examples/bot.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Example: async echo bot using the quicproquo Python SDK.
+"""Example: async echo bot using the quicprochat Python SDK.
 
 Connects to a qpq server, authenticates, and echoes back any received
 messages with a "[bot] " prefix.
@@ -19,7 +19,7 @@ import asyncio
 import signal
 import sys
 
-from quicproquo import QpqClient, ConnectOptions
+from quicprochat import QpqClient, ConnectOptions
 
 
 async def run_bot(opts: ConnectOptions, token: bytes, identity_key: bytes) -> None: