Fix 3 SonarCloud reliability bugs

- grpc_service.py: Remove redundant non-capturing group in regex
- spring_events.py: Remove redundant regex alternatives already covered by \w*Event
- file_discovery.py: Remove unreachable dead code after return statement

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: aksOps

src/osscodeiq/detectors/java/grpc_service.py

@@ -39,7 +39,7 @@
 
 # Method override pattern (simpler)
 _METHOD_RE = re.compile(
-    r"(?:public)\s+(?:void|[\w<>\[\]]+)\s+(\w+)\s*\(\s*(\w+)"
+    r"public\s+(?:void|[\w<>\[\]]+)\s+(\w+)\s*\(\s*(\w+)"
 )
 
 

src/osscodeiq/detectors/java/spring_events.py

@@ -22,7 +22,7 @@
     r"(?:new\s+(\w+)|(\w+))"
 )
 _METHOD_PARAM_RE = re.compile(r"(?:public|protected|private)?\s*\w+\s+(\w+)\s*\(\s*(\w+)\s+\w+\)")
-_EVENT_CLASS_RE = re.compile(r"class\s+(\w+)\s+extends\s+(?:ApplicationEvent|AbstractEvent|\w*Event)")
+_EVENT_CLASS_RE = re.compile(r"class\s+(\w+)\s+extends\s+\w*Event")
 
 
 class SpringEventsDetector:

src/osscodeiq/discovery/file_discovery.py

@@ -216,7 +216,6 @@ def _compute_sha256(file_path: Path) -> str:
     from osscodeiq.cache.hasher import hash_file
 
     return hash_file(file_path)
-    return h.hexdigest()
 
 
 class FileDiscovery: