Rollback gemini suggestion.

Pyright error:
Method "generate" overrides class "IDGenerator" in an incompatible manner   Parameter 2 name mismatch: base parameter is named "context", override parameter is named "_context" (reportIncompatibleMethodOverride)

Author: lkawka

src/a2a/server/id_generator.py

@@ -23,6 +23,6 @@ def generate(self, context: IDGeneratorContext) -> str:
 class UUIDGenerator(IDGenerator):
     """UUID implementation of the IDGenerator interface."""
 
-    def generate(self, _context: IDGeneratorContext) -> str:
+    def generate(self, context: IDGeneratorContext) -> str:
         """Generates a random UUID, ignoring the context."""
         return str(uuid.uuid4())