Add recently played to profiles

A play is recorded when a new track starts (pausing and resuming doesn't
count; returning after 10+ minutes does). Profiles show the last 10,
excluding the track playing now; 50 are kept per user. Recent plays are
free on every plan; the paid flag is renamed to fullHistory.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MzFywujuH9TiuXbr9vjoX8

apps/api/drizzle/0003_small_taskmaster.sql

@@ -0,0 +1,11 @@
+CREATE TABLE "listens" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" uuid NOT NULL,
+	"track_id" uuid NOT NULL,
+	"source" text NOT NULL,
+	"started_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "listens" ADD CONSTRAINT "listens_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "listens" ADD CONSTRAINT "listens_track_id_tracks_id_fk" FOREIGN KEY ("track_id") REFERENCES "public"."tracks"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "listens_user_started_idx" ON "listens" USING btree ("user_id","started_at" DESC NULLS LAST);