[FIX] mcp_server_git: replace deprecated pydantic functions and small fixes to typing issues

[hesreallyhim]

Description

This PR fixes some minor typing issues identified by mypy/pylance. It updates a deprecated pydantic function with its equivalent replacement, fixes some typing issues around strings, and adds a py.typed marker.

Server Details

• Server: git
• Changes to: typing and pydantic fixes (Tools, etc.)

Motivation and Context

The list of Tools uses the pydantic method schema which is deprecated, as indicated by pylance:

The method "schema" in class "BaseModel" is deprecated
  The `schema` method is deprecated; use `model_json_schema` instead.

In fact, schema now just points to model_json_schema, so there should be no functional effect.

Additionally, two places were showing warnings due to f-strings where the value could be a binary, so this was tweaked to use the !r syntax.

Additionally, git.Repo was being used as .refs[base_branch] which was causing pylance to complain. refs is an alias for references, as you can see in the source code, but I guess this is confusing for pylance. So I just changed it to references. Again, should be no effect.

Additionally, added py.typed for type-checkers.

How Has This Been Tested?

Tested various cases with Inspector, everything working fine. Automated tests are passing.

Breaking Changes

No.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

[hesreallyhim]

this server has been archived

[olaservo]

Thanks for the PR! This server was reverted from being archived so I reopened this.

[hesreallyhim]

@olaservo oh sweet thanks, much appreciated 🙏