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/openwrt.yml

@@ -43,11 +43,11 @@ jobs:
           CARGO_PROFILE_RELEASE_CODEGEN_UNITS: '1'
           CARGO_PROFILE_RELEASE_STRIP: symbols
         run: |
-          cargo zigbuild --release --target ${{ matrix.target }} --bin qpq-server
+          cargo zigbuild --release --target ${{ matrix.target }} --bin qpc-server
 
       - name: Check binary size
         run: |
-          BINARY="target/${{ matrix.target }}/release/qpq-server"
+          BINARY="target/${{ matrix.target }}/release/qpc-server"
           SIZE=$(stat -c%s "$BINARY")
           SIZE_MB=$(echo "scale=2; $SIZE / 1048576" | bc)
           echo "Binary size: ${SIZE_MB} MB"
@@ -60,6 +60,6 @@ jobs:
       - name: Upload artifact
         uses: actions/upload-artifact@v4
         with:
-          name: qpq-server-${{ matrix.target }}
-          path: target/${{ matrix.target }}/release/qpq-server
+          name: qpc-server-${{ matrix.target }}
+          path: target/${{ matrix.target }}/release/qpc-server
           retention-days: 30