Add per-server telemetry request diagnostics

src/lib/server/db/schema.sql

@@ -367,6 +367,24 @@ CREATE TABLE IF NOT EXISTS server_telemetry (
     received_at TEXT NOT NULL,
     payload TEXT
 );
+-- Request diagnostics survive registry removal and also capture unknown names.
+-- Bounded independently of the latest scoreboard and permanent leaderboard.
+CREATE TABLE IF NOT EXISTS telemetry_requests (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    server TEXT NOT NULL,
+    received_at TEXT NOT NULL,
+    status INTEGER NOT NULL,
+    error TEXT,
+    event TEXT,
+    map TEXT,
+    round INTEGER,
+    player_count INTEGER,
+    content_type TEXT,
+    payload TEXT NOT NULL,
+    payload_truncated INTEGER NOT NULL DEFAULT 0
+);
+CREATE INDEX IF NOT EXISTS idx_telemetry_requests_server ON telemetry_requests(server, id DESC);
+CREATE INDEX IF NOT EXISTS idx_telemetry_requests_received ON telemetry_requests(received_at);
 -- Lifecycle history deliberately survives removal of the server registry row.
 CREATE TABLE IF NOT EXISTS server_deployments (
     id TEXT PRIMARY KEY,