Modified README.md to include all listed tools

[Skeftical]

Description

Modified README.md to include all tools implemented in server.py under “MySQL AI and MySQL HeatWave ML and GenAI Tools”.

Added tools:

• ask_ml_rag_vector_store — Retrieve segments from the default vector store (skip_generate)
• ask_ml_rag_innodb — Retrieve segments from InnoDB tables using specified segment and embedding columns
• retrieve_relevant_schema_information — Retrieve relevant schemas and tables (DDL) for a natural language question

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[gebhardtr]

unrelated to this change, but the schema for this tool doesn't appear to match the code. From server.py:

@mcp.tool()
def load_vector_store_oci(
    connection_id: str,
    namespace: str,
    bucket_name: str,
    document_prefix: str,
) -> str:

[Skeftical]

Thanks for highlighting this. I have made a follow-up modification to reflect this.