chore: migrate to v3, Doppler secrets, clean up legacy code

- Remove all pre-v3 code: scraper, ui-v2, backend v1, ios v1+v2, legacy CI workflows
- Flatten v3/ contents to repo root
- Add Doppler secrets management (project=libnovel, config=prd)
- Add justfile with doppler run wrappers for all docker compose commands
- Strip hardcoded env fallbacks from docker-compose.yml
- Add minimal README.md
- Clean up .gitignore

backend/cmd/runner/main.go

@@ -19,9 +19,11 @@ 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"
+	"github.com/libnovel/backend/internal/meili"
 	"github.com/libnovel/backend/internal/novelfire"
 	"github.com/libnovel/backend/internal/runner"
 	"github.com/libnovel/backend/internal/storage"
@@ -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, "runner: sentry init warning: %v\n", err)
+		} else {
+			defer sentry.Flush(2 * time.Second)
+		}
+	}
+
 	// ── Logger ──────────────────────────────────────────────────────────────
 	log := buildLogger(cfg.LogLevel)
 	log.Info("runner starting",
@@ -74,7 +89,6 @@ func run() error {
 	browserClient := browser.NewDirectClient(browser.Config{
 		MaxConcurrent: workers,
 		Timeout:       timeout,
-		ProxyURL:      cfg.Runner.ProxyURL,
 	})
 	novel := novelfire.New(browserClient, log)
 
@@ -88,20 +102,39 @@ func run() error {
 		kokoroClient = &noopKokoro{}
 	}
 
+	// ── Meilisearch ─────────────────────────────────────────────────────────
+	var searchIndex meili.Client
+	if cfg.Meilisearch.URL != "" {
+		if err := meili.Configure(cfg.Meilisearch.URL, cfg.Meilisearch.APIKey); err != nil {
+			log.Warn("meilisearch configure failed — search indexing disabled", "err", err)
+			searchIndex = meili.NoopClient{}
+		} else {
+			searchIndex = meili.New(cfg.Meilisearch.URL, cfg.Meilisearch.APIKey)
+			log.Info("meilisearch enabled", "url", cfg.Meilisearch.URL)
+		}
+	} else {
+		log.Info("MEILI_URL not set — search indexing disabled")
+		searchIndex = meili.NoopClient{}
+	}
+
 	// ── Runner ──────────────────────────────────────────────────────────────
 	rCfg := runner.Config{
-		WorkerID:            cfg.Runner.WorkerID,
-		PollInterval:        cfg.Runner.PollInterval,
-		MaxConcurrentScrape: cfg.Runner.MaxConcurrentScrape,
-		MaxConcurrentAudio:  cfg.Runner.MaxConcurrentAudio,
-		OrchestratorWorkers: workers,
+		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,
 		Kokoro:      kokoroClient,
 		Log:         log,