Release 0.5.1: auto-unexclude, merge excluded_host into auth DB0.5.1

- /metrics: auto-remove exclusion when records mtime > excluded_at so
  hosts that resume uploading unexclude themselves on next scrape
- Consolidate excluded_host table into the auth DB (goprecords-auth.db)
  instead of a separate file — removes -db daemon flag and GOPRECORDS_DB env
- README: add host exclusion section with kubectl exec examples

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/internal/daemon/daemon.go b/internal/daemon/daemon.go
index 326224e..6346df6 100644
--- a/internal/daemon/daemon.go
+++ b/internal/daemon/daemon.go
@@ -31,7 +31,6 @@ type Config struct {
 	StatsDir  string
 	Addr      string
 	AuthDB    string
-	DB        string
 	LogOutput io.Writer
 }
 
@@ -42,17 +41,17 @@ func NewHandler(statsDir string) (http.Handler, error) {
 	if err != nil {
 		return nil, fmt.Errorf("auth db: %w", err)
 	}
-	return routes(statsDir, "", "", store), nil
+	return routes(statsDir, authkeys.DefaultPath(statsDir), store), nil
 }
 
-func routes(statsDir, authDB, db string, store *authkeys.Store) http.Handler {
+func routes(statsDir, authDB string, store *authkeys.Store) http.Handler {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", root(statsDir))
 	mux.HandleFunc("/health", health)
 	mux.HandleFunc("/livez", health)
 	mux.HandleFunc("/readyz", readiness(statsDir, authDB))
 	mux.HandleFunc("/report", report(statsDir))
-	mux.HandleFunc("/metrics", metricsHandler(statsDir, db))
+	mux.HandleFunc("/metrics", metricsHandler(statsDir, authDB))
 	mux.Handle("/upload/", uploadHandler(statsDir, store))
 	return mux
 }
@@ -148,12 +147,16 @@ func Run(ctx context.Context, cfg Config) error {
 	}
 	w := logWriter(cfg)
 	slogLog, textHandler := newDaemonLogger(w)
+	resolvedAuthDB := cfg.AuthDB
+	if resolvedAuthDB == "" {
+		resolvedAuthDB = authkeys.DefaultPath(cfg.StatsDir)
+	}
 	store, err := openAuthStore(ctx, cfg.StatsDir, cfg.AuthDB)
 	if err != nil {
 		return fmt.Errorf("auth db: %w", err)
 	}
 	defer store.Close()
-	srv := newDaemonHTTPServer(cfg.Addr, withAccessLog(slogLog, routes(cfg.StatsDir, cfg.AuthDB, cfg.DB, store)),
+	srv := newDaemonHTTPServer(cfg.Addr, withAccessLog(slogLog, routes(cfg.StatsDir, resolvedAuthDB, store)),
 		slog.NewLogLogger(textHandler, slog.LevelError))
 	slogLog.Info("daemon_listen", "addr", cfg.Addr)
 	errCh := make(chan error, 1)