Add reversible administrator room archiving

Organize closed rooms with archive filters, live-authorized atomic receipts and exact saved retries. Preserve saved games, timestamps, credentials, discussion and AI deadlines. Unarchive leaves play closed; reopen requires unarchive, and removal/restoration preserves both flags.

Verified types, lint, 5379 offline tests, 52 HTTP tests and build. Twenty dedicated administrator HTTP groups and independent privacy/persistence review passed. Desktop/mobile browser QA confirmed a single archive after a lost response and refresh, readable recovery text, mobile unarchive and separate reopening, and saved-seat restoration. All 2,049 baseline rooms, 4,348 seats and related records preserved. Authenticated production admin acceptance awaits authorized QA access; full admin and rules gates remain open.

drizzle/0014_admin_room_archive.sql

@@ -0,0 +1,28 @@
+CREATE TABLE `admin_room_archives` (
+	`operation_id` text PRIMARY KEY NOT NULL,
+	`actor_admin_id` text NOT NULL,
+	`room_code` text NOT NULL,
+	`request_hash` text NOT NULL,
+	`expected_version` integer NOT NULL,
+	`expected_revision` integer NOT NULL,
+	`applied_version` integer NOT NULL,
+	`applied_revision` integer NOT NULL,
+	`archived` integer NOT NULL,
+	`reason` text NOT NULL,
+	`before_metadata` text NOT NULL,
+	`after_metadata` text NOT NULL,
+	`created_at` integer NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX `admin_room_archives_room` ON `admin_room_archives` (`room_code`,`created_at`);--> statement-breakpoint
+CREATE TABLE `room_archives` (
+	`room_code` text PRIMARY KEY NOT NULL,
+	`archived` integer DEFAULT 0 NOT NULL,
+	`revision` integer DEFAULT 0 NOT NULL,
+	`archived_at` integer,
+	`updated_at` integer NOT NULL,
+	FOREIGN KEY (`room_code`) REFERENCES `rooms`(`code`) ON UPDATE no action ON DELETE cascade,
+	CONSTRAINT "room_archives_archived" CHECK("room_archives"."archived" IN (0, 1)),
+	CONSTRAINT "room_archives_revision" CHECK("room_archives"."revision" >= 0),
+	CONSTRAINT "room_archives_time" CHECK(("room_archives"."archived" = 1 AND "room_archives"."archived_at" IS NOT NULL) OR ("room_archives"."archived" = 0 AND "room_archives"."archived_at" IS NULL))
+);

drizzle/meta/_journal.json

@@ -99,6 +99,13 @@
       "when": 1790042692212,
       "tag": "0013_admin_room_closure",
       "breakpoints": true
+    },
+    {
+      "idx": 14,
+      "version": "6",
+      "when": 1790044461950,
+      "tag": "0014_admin_room_archive",
+      "breakpoints": true
     }
   ]
 }