Revert all TCK changes

Author: ishymko

.github/workflows/run-tck.yaml

@@ -2,9 +2,9 @@ name: Run TCK
 
 on:
   push:
-    branches: [ "main", "1.0-dev" ]
+    branches: [ "main" ]
   pull_request:
-    branches: [ "main", "1.0-dev" ]
+    branches: [ "main" ]
     paths-ignore:
       - '**.md'
       - 'LICENSE'
@@ -14,7 +14,7 @@ permissions:
   contents: read
 
 env:
-  TCK_VERSION: d36f441b560ec09ba2357d3a51c45c5b4ab258f7
+  TCK_VERSION: 0.3.0.beta3
   SUT_BASE_URL: http://localhost:41241
   SUT_JSONRPC_URL: http://localhost:41241/a2a/jsonrpc
   UV_SYSTEM_PYTHON: 1