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

.github/workflows/bench.yml

@@ -35,7 +35,7 @@ jobs:
             ${{ runner.os }}-bench-
 
       - name: Run benchmarks
-        run: cargo bench --package quicproquo-core -- --output-format=bencher 2>&1 | tee bench-output.txt
+        run: cargo bench --package quicprochat-core -- --output-format=bencher 2>&1 | tee bench-output.txt
 
       - name: Upload HTML reports
         uses: actions/upload-artifact@v4