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/storage/models.py

@@ -109,7 +109,9 @@ class WalletRelationshipModel(Base):
     )
 
     __table_args__ = (
-        UniqueConstraint("wallet_a", "wallet_b", "relationship_type", name="uq_wallet_relationship"),
+        UniqueConstraint(
+            "wallet_a", "wallet_b", "relationship_type", name="uq_wallet_relationship"
+        ),
         Index("idx_wallet_relationships_a", "wallet_a"),
         Index("idx_wallet_relationships_b", "wallet_b"),
     )