Fix GitHub Actions: resolve black formatting and pytest fixture issues

Co-authored-by: 0xrinegade <[email protected]>

Author: Copilot

python/solana_ai_registries/client.py

@@ -371,9 +371,7 @@ async def send_transaction(
         for attempt in range(max_retries):
             try:
                 # Get fresh blockhash for each attempt using robust method
-                fresh_blockhash = await self._get_fresh_blockhash(
-                    max_attempts=3
-                )
+                fresh_blockhash = await self._get_fresh_blockhash(max_attempts=3)
 
                 # Wait longer to ensure blockhash propagated across network
                 if attempt > 0:

python/tests/integration/test_devnet.py

@@ -55,6 +55,7 @@ async def client(self):
         yield client
         await client.close()
 
+    @pytest.fixture
     def test_keypair(self):
         """Generate a test keypair for operations."""
         return Keypair()
@@ -185,6 +186,7 @@ async def client(self):
         yield client
         await client.close()
 
+    @pytest.fixture
     def test_keypair(self):
         """Generate a test keypair for operations."""
         return Keypair()
@@ -395,6 +397,7 @@ async def client(self):
         yield client
         await client.close()
 
+    @pytest.fixture
     def test_keypair(self):
         """Generate a test keypair."""
         return Keypair()