Fix tools visibility - revert to v0.1.6 authentication approach

- Disable issuer validation in BearerAuthProvider (issuer=None)
- Simplify authentication condition (remove auth_enabled check)
- Revert CORS middleware to simple configuration
- Fix OAuth metadata endpoint to match v0.1.6
- Apply conditional auth only to MCP server creation

Critical fixes for Claude AI tools discovery

saidsurucu-yargi-mcp-f5fa007/check_response_format.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+from fastmcp import Client
+from mcp_server_main import app
+import json
+import asyncio
+
+async def check_response_format():
+    client = Client(app)
+    async with client:
+        result = await client.call_tool('search_bedesten_unified', {
+            'phrase': 'mülkiyet',
+            'court_types': ['YARGITAYKARARI'],
+            'birimAdi': 'H1',
+            'pageSize': 3
+        })
+        if result and result.content:
+            data = json.loads(result.content[0].text)
+            print('Response keys:', list(data.keys()))
+            print('Sample response:', json.dumps(data, indent=2, ensure_ascii=False)[:500])
+
+asyncio.run(check_response_format())