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/transport/transport.go

@@ -1,4 +1,4 @@
-// Package transport provides the low-level QUIC+TLS connection to a quicproquo server
+// Package transport provides the low-level QUIC+TLS connection to a quicprochat server
 // and bootstraps the Cap'n Proto RPC client over a single bidirectional QUIC stream.
 package transport
 
@@ -14,10 +14,10 @@ import (
 	"capnproto.org/go/capnp/v3/rpc"
 	"github.com/quic-go/quic-go"
 
-	"quicproquo.dev/sdk/go/proto/node"
+	"quicprochat.dev/sdk/go/proto/node"
 )
 
-// ConnectOptions configures the connection to a quicproquo server.
+// ConnectOptions configures the connection to a quicprochat server.
 type ConnectOptions struct {
 	// Addr is the host:port of the server (e.g. "127.0.0.1:5001").
 	Addr string