feat(api): add /api/requests user-facing CRUD

Implements POST/GET/GET:id/DELETE /api/requests handlers delegating to
lidarrrequests.Service; wires routes in RequireUser group and threads
the service through Mount and server.go.

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

internal/api/auth_test.go

@@ -23,6 +23,7 @@ import (
 	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/dbtest"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrconfig"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrrequests"
 	"git.fabledsword.com/bvandeusen/minstrel/internal/playevents"
 )
 
@@ -55,7 +56,9 @@ func testHandlers(t *testing.T) (*handlers, *pgxpool.Pool) {
 		ContextWeight: 2.0, SimilarityWeight: 2.0,
 		RecentlyPlayedHours: 1, RadioSize: 50, RadioSizeMax: 200,
 	}
-	h := &handlers{pool: pool, logger: logger, events: w, recCfg: recCfg, rng: func() float64 { return 0.5 }, lidarrCfg: lidarrconfig.New(pool)}
+	lidarrCfg := lidarrconfig.New(pool)
+	lidarrReqs := lidarrrequests.NewService(pool, lidarrCfg, nil, nil)
+	h := &handlers{pool: pool, logger: logger, events: w, recCfg: recCfg, rng: func() float64 { return 0.5 }, lidarrCfg: lidarrCfg, lidarrRequests: lidarrReqs}
 	return h, pool
 }