refactor(backend): simplify media schema and recording metadata

Backend/drizzle/0001_regular_ulik.sql

@@ -1 +1 @@
-ALTER TABLE "users" ADD COLUMN "password_hash" varchar(255) NOT NULL;
+ALTER TABLE "users" ADD COLUMN IF NOT EXISTS "password_hash" varchar(255) NOT NULL;

Backend/drizzle/0014_schema_simplification.sql

@@ -0,0 +1,39 @@
+ALTER TABLE "device_commands" RENAME TO "commands";--> statement-breakpoint
+ALTER TABLE "push_notifications" RENAME TO "notification_deliveries";--> statement-breakpoint
+ALTER TABLE "recordings" ALTER COLUMN "stream_session_id" DROP NOT NULL;--> statement-breakpoint
+ALTER TABLE "recordings" ALTER COLUMN "requester_device_id" DROP NOT NULL;--> statement-breakpoint
+INSERT INTO "recordings" (
+  "id",
+  "owner_user_id",
+  "stream_session_id",
+  "camera_device_id",
+  "requester_device_id",
+  "event_id",
+  "object_key",
+  "bucket",
+  "duration_seconds",
+  "size_bytes",
+  "status",
+  "available_at",
+  "error",
+  "created_at",
+  "updated_at"
+)
+SELECT
+  "id",
+  "user_id",
+  NULL,
+  "device_id",
+  NULL,
+  "event_id",
+  "object_key",
+  "bucket",
+  NULL,
+  NULL,
+  CASE WHEN "download_url" IS NOT NULL THEN 'ready' ELSE 'awaiting_upload' END,
+  CASE WHEN "download_url" IS NOT NULL THEN "updated_at" ELSE NULL END,
+  NULL,
+  "created_at",
+  "updated_at"
+FROM "videos";--> statement-breakpoint
+DROP TABLE "videos";

Backend/drizzle/meta/_journal.json

@@ -99,6 +99,13 @@
       "when": 1770800000000,
       "tag": "0013_users_password_hash_nullable",
       "breakpoints": true
+    },
+    {
+      "idx": 14,
+      "version": "7",
+      "when": 1770900000000,
+      "tag": "0014_schema_simplification",
+      "breakpoints": true
     }
   ]
 }