Migrate the rest of python unit tests to conformance tests (#1266)

* Remove redundant schema validation tests and legacy payload helper methods

* Remove example loading logic from A2uiCatalog and replace with standardized conformance test data files

* Migrate schema modifier tests from Python to conformance YAML files

* Add Schema Manager conformance tests

* Migrate streaming parser conformance tests to a dedicated configuration file and remove legacy parser tests.

* Migrate payload fixer unit tests to conformance test suite

* Migrate c++ parser tests to centralized conformance runner and consolidate utility tests

* Consolidate streaming parser tests into conformance tests

* Implement catalog conformance test runner

* Implement SchemaManager conformance tests in C++ and remove redundant schema manager test file

* Reorganize conformance test suite into modular subdirectories and update test loader paths

* Remove json-schema-validator dependency and modernize memory management in conformance tests

* Update the conformance tests for schema management

* Update README to reflect restructuring of conformance test suites and data directories

* Update s2c_schema path in validator

* Silence unused variable warning in example validation during JSON parsing

* Update conformance schema to make catalog fields optional in root and move validation to anyOf variants

* Standardize conformance test schema and update runners to support multi-step test definitions

Author: nan-yu

agent_sdks/conformance/README.md

@@ -3,9 +3,20 @@
 To ensure behavioral parity across all SDK implementations (Python, Kotlin, etc.), the project maintains a language-agnostic conformance suite in this directory.
 
 ## Suite Structure
-*   `parser.yaml`: Contains test cases for the `A2uiStreamParser`, verifying chunk buffering, incremental yielding, and edge cases like cut tokens.
-*   `validator.yaml`: Contains test cases for the `A2uiValidator`, verifying structural integrity, cycle detection, and reachability.
-*   `conformance_schema.json`: The JSON schema that validates the structure of the YAML test files themselves.
+All test suites are located in the `suites/` directory:
+*   `suites/streaming_parser.yaml`: Contains test cases for the `A2uiStreamParser` (streaming), verifying chunk buffering, incremental yielding, and edge cases like cut tokens.
+*   `suites/parser.yaml`: Contains test cases for non-streaming parsing and payload fixing.
+*   `suites/validator.yaml`: Contains test cases for the `A2uiValidator`, verifying structural integrity, cycle detection, and reachability.
+*   `suites/catalog.yaml`: Contains test cases for `A2uiCatalog` (prune, render, load).
+*   `suites/schema_manager.yaml`: Contains test cases for `A2uiSchemaManager` (select_catalog, load_catalog, generate_prompt).
+
+All static test data and simplified schemas are located in the `test_data/` directory.
+
+`conformance_schema.json` at the root is the JSON schema that validates the structure of the YAML test files themselves.
+
+
+
+
 
 ## Usage in SDKs
 Each language SDK must implement a test harness that: