feat(backend): remove browse-page cache, add Sentry/GlitchTip, rename MinIO buckets

- Remove BrowseStore interface + all browse MinIO ops (PutBrowsePage, GetBrowsePage,
  BrowseObjectKey, putBrowse, getBrowse); the /api/browse endpoint was replaced by
  the Meilisearch-backed /api/catalogue route
- Remove browse_refresh.go and the 6h browse refresh ticker in runner
- Add Sentry/GlitchTip error tracking to both backend and runner binaries via
  github.com/getsentry/sentry-go; opt-in via GLITCHTIP_DSN env var
- Wrap http.ServeMux with sentryhttp middleware for automatic panic recovery
- Rename MinIO bucket defaults: libnovel-chapters→chapters, libnovel-audio→audio,
  libnovel-browse→catalogue (env vars still override)
- Remove staged compiled binaries (backend/bin/runner, backend/healthcheck)

v3/backend/cmd/backend/main.go

@@ -2,7 +2,7 @@
 //
 // It exposes all endpoints consumed by the SvelteKit UI: book/chapter reads,
 // scrape-task creation, presigned MinIO URLs, audio-task creation, reading
-// progress, live novelfire.net browse/search, and Kokoro voice list.
+// progress, live novelfire.net search, and Kokoro voice list.
 //
 // All heavy lifting (scraping, TTS generation) is delegated to the runner
 // binary via PocketBase task records. The backend never scrapes directly.
@@ -19,7 +19,9 @@ import (
 	"os"
 	"os/signal"
 	"syscall"
+	"time"
 
+	"github.com/getsentry/sentry-go"
 	"github.com/libnovel/backend/internal/backend"
 	"github.com/libnovel/backend/internal/config"
 	"github.com/libnovel/backend/internal/kokoro"
@@ -43,6 +45,19 @@ func main() {
 func run() error {
 	cfg := config.Load()
 
+	// ── Sentry / GlitchTip error tracking ────────────────────────────────────
+	if dsn := os.Getenv("GLITCHTIP_DSN"); dsn != "" {
+		if err := sentry.Init(sentry.ClientOptions{
+			Dsn:              dsn,
+			Release:          version + "@" + commit,
+			TracesSampleRate: 0.1,
+		}); err != nil {
+			fmt.Fprintf(os.Stderr, "backend: sentry init warning: %v\n", err)
+		} else {
+			defer sentry.Flush(2 * time.Second)
+		}
+	}
+
 	// ── Logger ───────────────────────────────────────────────────────────────
 	log := buildLogger(cfg.LogLevel)
 	log.Info("backend starting",
@@ -95,7 +110,6 @@ func run() error {
 			AudioStore:    store,
 			PresignStore:  store,
 			ProgressStore: store,
-			BrowseStore:   store,
 			CoverStore:    store,
 			Producer:      store,
 			TaskReader:    store,

v3/backend/cmd/runner/main.go

@@ -19,6 +19,7 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/getsentry/sentry-go"
 	"github.com/libnovel/backend/internal/browser"
 	"github.com/libnovel/backend/internal/config"
 	"github.com/libnovel/backend/internal/kokoro"
@@ -44,6 +45,19 @@ func main() {
 func run() error {
 	cfg := config.Load()
 
+	// ── Sentry / GlitchTip error tracking ────────────────────────────────────
+	if dsn := os.Getenv("GLITCHTIP_DSN"); dsn != "" {
+		if err := sentry.Init(sentry.ClientOptions{
+			Dsn:              dsn,
+			Release:          version + "@" + commit,
+			TracesSampleRate: 0.1,
+		}); err != nil {
+			fmt.Fprintf(os.Stderr, "runner: sentry init warning: %v\n", err)
+		} else {
+			defer sentry.Flush(2 * time.Second)
+		}
+	}
+
 	// ── Logger ──────────────────────────────────────────────────────────────
 	log := buildLogger(cfg.LogLevel)
 	log.Info("runner starting",
@@ -105,21 +119,20 @@ func run() error {
 
 	// ── Runner ──────────────────────────────────────────────────────────────
 	rCfg := runner.Config{
-		WorkerID:                 cfg.Runner.WorkerID,
-		PollInterval:             cfg.Runner.PollInterval,
-		MaxConcurrentScrape:      cfg.Runner.MaxConcurrentScrape,
-		MaxConcurrentAudio:       cfg.Runner.MaxConcurrentAudio,
-		OrchestratorWorkers:      workers,
-		MetricsAddr:              cfg.Runner.MetricsAddr,
-		CatalogueRefreshInterval:            cfg.Runner.CatalogueRefreshInterval,
-		SkipInitialCatalogueRefresh:         cfg.Runner.SkipInitialCatalogueRefresh,
+		WorkerID:                    cfg.Runner.WorkerID,
+		PollInterval:                cfg.Runner.PollInterval,
+		MaxConcurrentScrape:         cfg.Runner.MaxConcurrentScrape,
+		MaxConcurrentAudio:          cfg.Runner.MaxConcurrentAudio,
+		OrchestratorWorkers:         workers,
+		MetricsAddr:                 cfg.Runner.MetricsAddr,
+		CatalogueRefreshInterval:    cfg.Runner.CatalogueRefreshInterval,
+		SkipInitialCatalogueRefresh: cfg.Runner.SkipInitialCatalogueRefresh,
 	}
 	deps := runner.Dependencies{
 		Consumer:    store,
 		BookWriter:  store,
 		BookReader:  store,
 		AudioStore:  store,
-		BrowseStore: store,
 		CoverStore:  store,
 		SearchIndex: searchIndex,
 		Novel:       novel,