Add support for PyPI package publish

[ShreyeshArangath]

Summary

Add support for publishing the OH dataloader to PyPI on every commit.

Changes

• Client-facing API Changes
• Internal API Changes
• Bug Fixes
• New Features
• Performance Improvements
• Code Style
• Refactoring
• Documentation
• Tests

Testing Done

Tested the Python release workflow locally using act:

  ### ✅ Test Python Packages
  - Python 3.12.12 setup successful
  - uv 0.9.30 installed
  - Dependencies synced (51 packages installed)
  - Linting: `All checks passed!`
  - Formatting: `9 files already formatted`
  - Tests: `1 passed in 0.00s`

  ### ✅ Tag Python Release
  - Version extracted: `0.1.0`
  - Output set correctly for downstream jobs

  ### ✅ Discover Python Packages
  - Discovered: `["integrations/python/dataloader"]`

  ### ✅ Build Python Package
  - Dependencies synced successfully
  - Version updated: `0.1.0`
  - Build artifacts created:
    - `openhouse_dataloader-0.1.0.tar.gz`
    - `openhouse_dataloader-0.1.0-py3-none-any.whl`
  - **Twine validation: PASSED** ✅
    - Wheel: `PASSED`
    - Source dist: `PASSED`

  ### ⏭️ Publish to PyPI
  - Skipped (requires actual GitHub Actions environment)

  ### Note
  - Upload artifacts step fails in `act` (expected - requires `ACTIONS_RUNTIME_TOKEN`)
  - All critical build and validation steps pass successfully

• Manually Tested on local docker setup. Please include commands ran, and their output.
• Added new tests for the changes made.
• Updated existing tests to reflect the changes made.
• No tests added or updated. Please explain why. If unsure, please feel free to ask for help.
• Some other form of testing like staging or soak time in production. Please explain.

For all the boxes checked, include a detailed description of the testing done for the changes made in this pull request.

Additional Information

• Breaking Changes
• Deprecations
• Large PR broken into smaller PRs, and PR plan linked in the description.

For all the boxes checked, include additional details of the changes made in this pull request.

[robreeves]

LGTM!