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/detector/sniper.py

@@ -228,10 +228,17 @@ class SniperDetector:
             for entry in entries:
                 # Normalize market ID to 0-1 range
                 market_hash = (
-                    int(hashlib.md5(  # noqa: S324
-                        entry.market_id.encode()
-                    ).hexdigest()[:8], 16) % 1000
-                ) / 1000.0
+                    (
+                        int(
+                            hashlib.md5(  # noqa: S324
+                                entry.market_id.encode()
+                            ).hexdigest()[:8],
+                            16,
+                        )
+                        % 1000
+                    )
+                    / 1000.0
+                )
 
                 # Normalize entry delta to hours (0-5 mins = 0-0.083 hours)
                 delta_hours = entry.entry_delta_seconds / 3600.0
@@ -415,11 +422,7 @@ class SniperDetector:
         overlap_factor = min(1.0, markets_common / 5.0)
 
         # Weighted combination
-        confidence = (
-            0.3 * size_factor +
-            0.4 * speed_factor +
-            0.3 * overlap_factor
-        )
+        confidence = 0.3 * size_factor + 0.4 * speed_factor + 0.3 * overlap_factor
 
         return round(min(1.0, confidence), 3)