fix: resolve linting and formatting issues for CI

- Use contextlib.suppress instead of try/except/pass (SIM105)
- Prefix unused fixture arguments with underscore (ARG002)
- Replace asyncio.TimeoutError with TimeoutError (UP041)
- Apply ruff formatting to all files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/polymarket_insider_tracker/profiler/chain.py

@@ -503,9 +503,7 @@ class PolygonClient:
         balance_task = self.get_balance(address)
         first_tx_task = self.get_first_transaction(address)
 
-        nonce, balance, first_tx = await asyncio.gather(
-            nonce_task, balance_task, first_tx_task
-        )
+        nonce, balance, first_tx = await asyncio.gather(nonce_task, balance_task, first_tx_task)
 
         return WalletInfo(
             address=address.lower(),