chore(housekeeping): canonical git.d-ma.be host + honest version string

- Dockerfile: GOPRIVATE and the http→https insteadOf rewrite now name
  git.d-ma.be (was the pre-rename gitea.d-ma.be; masked at build time only by
  GOPROXY=direct + GOSUMDB=off).
- .context/PROJECT.md Repo URL → git.d-ma.be, adapters regenerated
  (CLAUDE.md, AGENTS.md, .cursorrules, .aider.conventions.md, system-prompt.txt).
- main.go: version is now a `-ldflags -X main.version` overridable var defaulting
  to "dev" instead of a hardcoded, drifting "0.1.0".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cmd/gitea-mcp/main.go

@@ -18,6 +18,11 @@ import (
 	"git.d-ma.be/mathias/gitea-mcp/internal/tools"
 )
 
+// version is the build version, overridable via -ldflags "-X main.version=<tag>".
+// Defaults to "dev" for local / un-stamped builds (was a hardcoded, drifting
+// "0.1.0" — it now tells the truth instead of a stale literal).
+var version = "dev"
+
 func main() {
 	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
 	// Route the chassis's package-level slog (auth audit logs, gitea-mcp#9) through
@@ -69,7 +74,7 @@ func main() {
 	}
 
 	addr := ":" + cfg.Port
-	logger.Info("gitea-mcp starting", "addr", addr, "version", "0.1.0")
+	logger.Info("gitea-mcp starting", "addr", addr, "version", version)
 	if err := http.ListenAndServe(addr, mux); err != nil {
 		logger.Error("server stopped", "err", err)
 		os.Exit(1)