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

packaging/openwrt/files/quicprochat.init

@@ -0,0 +1,45 @@
+#!/bin/sh /etc/rc.common
+# procd init script for quicprochat server.
+# Reads configuration from /etc/config/quicprochat (uci).
+
+START=95
+STOP=10
+USE_PROCD=1
+
+PROG=/usr/bin/qpc-server
+DATA_DIR=/var/lib/quicprochat
+
+start_service() {
+    local listen data_dir log_level tls_cert tls_key production
+
+    config_load quicprochat
+    config_get listen server listen '0.0.0.0:7000'
+    config_get data_dir server data_dir "$DATA_DIR"
+    config_get log_level server log_level 'info'
+    config_get tls_cert server tls_cert "${data_dir}/server-cert.der"
+    config_get tls_key server tls_key "${data_dir}/server-key.der"
+    config_get_bool production server production 1
+
+    [ -d "$data_dir" ] || mkdir -p "$data_dir"
+
+    procd_open_instance
+    procd_set_param command "$PROG"
+
+    procd_set_param env \
+        RUST_LOG="$log_level" \
+        QPC_LISTEN="$listen" \
+        QPC_DATA_DIR="$data_dir" \
+        QPC_TLS_CERT="$tls_cert" \
+        QPC_TLS_KEY="$tls_key" \
+        QPC_PRODUCTION="$production"
+
+    procd_set_param respawn 3600 5 5
+    procd_set_param stderr 1
+    procd_set_param stdout 1
+    procd_set_param user qpc
+    procd_close_instance
+}
+
+service_triggers() {
+    procd_add_reload_trigger "quicprochat"
+}