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/quicprochat/client.py

@@ -1,27 +1,27 @@
-"""High-level quicproquo client.
+"""High-level quicprochat client.
 
 Provides both async (QUIC transport) and sync (FFI transport) APIs for
-interacting with a quicproquo server.
+interacting with a quicprochat server.
 """
 
 from __future__ import annotations
 
 from typing import Optional
 
-from quicproquo.types import (
+from quicprochat.types import (
     ConnectOptions,
     Envelope,
     ChannelResult,
     HealthInfo,
     ConnectionError,
 )
-from quicproquo.transport import QuicTransport
-from quicproquo.ffi import FfiTransport
-from quicproquo import proto, wire
+from quicprochat.transport import QuicTransport
+from quicprochat.ffi import FfiTransport
+from quicprochat import proto, wire
 
 
 class QpqClient:
-    """High-level quicproquo client.
+    """High-level quicprochat client.
 
     Use ``QpqClient.connect()`` for the async QUIC transport, or
     ``QpqClient.connect_ffi()`` for the synchronous Rust FFI backend.