Enhance database agent with schema and query logging features

- Introduced QuestionMeta model to encapsulate question, SQL, and prompt.
- Updated _parse_schema_to_knowledge to save DDL and DML records in JSON format.
- Modified question_to_sql to return QuestionMeta instead of raw SQL.
- Improved error handling in database manager to raise SQLExecutionError.
- Refactored prompt generation for question inference to use predefined templates.

Author: coolbeevip

Makefile

@@ -16,6 +16,8 @@ lint_tests: PYTHON_FILES=tests
 lint_tests: MYPY_CACHE=.mypy_cache_test
 
 lint lint_diff lint_package lint_tests:
+	ruff -V
+	mypy -V
 	[ "$(PYTHON_FILES)" = "" ] || ruff check $(PYTHON_FILES)
 	[ "$(PYTHON_FILES)" = "" ] || ruff format $(PYTHON_FILES) --diff
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE) && mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)