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/go/qpc/client.go

@@ -1,4 +1,4 @@
-// Package qpq provides the high-level Go API for interacting with a quicproquo server.
+// Package qpq provides the high-level Go API for interacting with a quicprochat server.
 //
 // It wraps the generated Cap'n Proto types and transport layer into an
 // ergonomic client that handles authentication, key management, and messaging.
@@ -8,11 +8,11 @@ import (
 	"context"
 	"fmt"
 
-	"quicproquo.dev/sdk/go/proto/node"
-	"quicproquo.dev/sdk/go/transport"
+	"quicprochat.dev/sdk/go/proto/node"
+	"quicprochat.dev/sdk/go/transport"
 )
 
-// Options configures the connection to a quicproquo server.
+// Options configures the connection to a quicprochat server.
 type Options struct {
 	// Addr is the host:port of the server (e.g. "127.0.0.1:5001").
 	Addr string
@@ -30,7 +30,7 @@ type Message struct {
 	Data []byte
 }
 
-// Client is the high-level quicproquo client.
+// Client is the high-level quicprochat client.
 type Client struct {
 	conn     *transport.Connection
 	token    []byte // session token from OPAQUE login