chore: add log-tag lint + fix biome errors + pre-push hook

- scripts/lint-log-tags.sh: static check for invalid Crockford Base32 log tags (I/L/O/U)
- fix two invalid log tags in ws-client.ts (6CJX2RLP→6CJX2R8P, T9W2KL5H→T9W2K35H)
- fix biome errors: unused import, exhaustive deps, cognitive complexity suppression
- add pre-push git hook running bun run check
- integrate lint-log-tags into bun run check pipeline

Refs #244

packages/cli-workflow/src/commands/serve/ws-client.ts

@@ -100,7 +100,7 @@ export function startGatewayWsClient(params: GatewayWsClientParams): () => void
     clearReconnectTimer();
     const delayMs = Math.min(INITIAL_BACKOFF_MS * 2 ** attempt, MAX_BACKOFF_MS);
     attempt++;
-    params.log("6CJX2RLP", `gateway WebSocket reconnect in ${delayMs}ms (attempt ${attempt})`);
+    params.log("6CJX2R8P", `gateway WebSocket reconnect in ${delayMs}ms (attempt ${attempt})`);
     reconnectTimer = setTimeout(connect, delayMs);
   };
 
@@ -143,7 +143,7 @@ export function startGatewayWsClient(params: GatewayWsClientParams): () => void
     ws.addEventListener("message", (ev) => {
       const data = ev.data;
       if (typeof data !== "string") {
-        params.log("T9W2KL5H", "gateway WebSocket non-text frame ignored");
+        params.log("T9W2K35H", "gateway WebSocket non-text frame ignored");
         return;
       }
       void handleGatewayMessage(ws, data, params).catch((e: unknown) => {