feat(server/m7-353): config + main.go wiring for coverart enricher

cmd/minstrel/main.go

@@ -13,6 +13,7 @@ import (
 
 	"git.fabledsword.com/bvandeusen/minstrel/internal/auth"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/config"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/coverart"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/db"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/library"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrconfig"
@@ -71,11 +72,34 @@ func run() error {
 	}
 
 	scanner := library.New(pool, logger, cfg.Library.ScanPaths)
+
+	contact := cfg.Library.ContactEmail
+	if contact == "" {
+		contact = "https://git.fabledsword.com/bvandeusen/minstrel"
+	}
+	coverFetcher := coverart.NewFetcher(coverart.FetcherConfig{
+		UserAgent: fmt.Sprintf("Minstrel/dev (%s)", contact),
+		MinPeriod: time.Second,
+	})
+	coverEnricher := coverart.NewEnricher(pool, logger.With("component", "coverart"), coverFetcher, cfg.Library.CoverArtFromMBCAA)
+
 	if cfg.Library.ScanOnStartup && len(cfg.Library.ScanPaths) > 0 {
 		go func() {
 			if _, err := scanner.Scan(ctx); err != nil {
 				logger.Error("startup scan failed", "err", err)
 			}
+			// Enrich any newly-imported albums (and resume any partial backlog).
+			if _, err := coverEnricher.EnrichBatch(ctx, cfg.Library.CoverArtBackfillCap); err != nil {
+				logger.Warn("post-scan cover enrichment failed", "err", err)
+			}
+		}()
+	} else {
+		// No startup scan — still run the boot backfill once for any rows
+		// the previous run didn't get to.
+		go func() {
+			if _, err := coverEnricher.EnrichBatch(ctx, cfg.Library.CoverArtBackfillCap); err != nil {
+				logger.Warn("boot cover enrichment failed", "err", err)
+			}
 		}()
 	}
 

internal/config/config.go

@@ -69,8 +69,11 @@ type AdminBootstrapConfig struct {
 }
 
 type LibraryConfig struct {
-	ScanPaths     []string `yaml:"scan_paths"`
+	ScanPaths           []string `yaml:"scan_paths"`
-	ScanOnStartup bool     `yaml:"scan_on_startup"`
+	ScanOnStartup       bool     `yaml:"scan_on_startup"`
+	CoverArtFromMBCAA   bool     `yaml:"coverart_from_mbcaa"`   // default true
+	CoverArtBackfillCap int      `yaml:"coverart_backfill_cap"` // default 500
+	ContactEmail        string   `yaml:"contact_email"`         // optional override for MBCAA UA
 }
 
 // SubsonicConfig controls wire-format concessions on the /rest/* surface.
@@ -134,6 +137,10 @@ func Default() Config {
 			RadioSize:           50,
 			RadioSizeMax:        200,
 		},
+		Library: LibraryConfig{
+			CoverArtFromMBCAA:   true,
+			CoverArtBackfillCap: 500,
+		},
 	}
 }
 
@@ -189,6 +196,19 @@ func applyEnv(cfg *Config) {
 			cfg.Library.ScanOnStartup = b
 		}
 	}
+	if v, ok := os.LookupEnv("MINSTREL_LIBRARY_COVERART_FROM_MBCAA"); ok {
+		if b, err := strconv.ParseBool(v); err == nil {
+			cfg.Library.CoverArtFromMBCAA = b
+		}
+	}
+	if v, ok := os.LookupEnv("MINSTREL_LIBRARY_COVERART_BACKFILL_CAP"); ok {
+		if n, err := strconv.Atoi(v); err == nil {
+			cfg.Library.CoverArtBackfillCap = n
+		}
+	}
+	if v, ok := os.LookupEnv("MINSTREL_CONTACT_EMAIL"); ok {
+		cfg.Library.ContactEmail = v
+	}
 	if v, ok := os.LookupEnv("MINSTREL_SUBSONIC_ALLOW_PLAINTEXT_PASSWORD"); ok {
 		if b, err := strconv.ParseBool(v); err == nil {
 			cfg.Subsonic.AllowPlaintextPassword = b