chore(release): bump version to 6.1.29

[dwolfson]

Summary

• Bump version to 6.1.29 (pyproject.toml + uv.lock only).
• PyPI returns 404 for 6.1.29; no v6.1.29 tag exists; latest tag and PyPI release are 6.1.28.

What 6.1.29 contains (9 commits since v6.1.28)

• product-manager (feat(product-manager): subscription types and ODCS/ODPS documents, with Dr.Egeria commands #427): subscription-type and ODCS/ODPS import/publish/generate SDK methods, plus the Dr.Egeria commands Create Subscription Type, Import Data Contract, Import Data Product, Publish Data Contract, Publish Data Product, and get_governance_action_processes_by_name
• metadata-expert (feat(metadata_expert): add/update/delete open metadata type definitions #428): add_enum_def, add_type_def, update_type_def, delete_type_def, delete_enum_def. Two of these fail against current Egeria because of server bugs (ISSUE-124, ISSUE-125); the docstrings say so.
• asset-maker / connection-maker (feat(sdk): add the DataSetContent and resource-connection audit-gap methods #426): DataSetContent update/detach and resource-connection link/detach
• fixes: the mcp_adapter no longer writes the caller's password to stderr and the log (fix(mcp_adapter): stop writing the caller's password to stderr and the log (ISSUE-121) #425, ISSUE-121); ProductManager/DigitalBusiness now run CollectionManager.__init__, and delete_collection/delete_digital_product cascade=True now reaches the server (ISSUE-126/127)
• docs: issues-log entries (docs(issues): log ISSUE-121, mcp_adapter writes user_pass to stderr and log #423, docs(issues): ISSUE-123 count_elements returns 0 on any failure #430, docs(issues): live re-test results for ISSUE-102 and ISSUE-90 on the rebuilt platform #431) and a CI dependency bump (chore(deps): Bump actions/checkout from 4 to 7 #397)

Release notes to watch

• The tag-triggered workflow publishes to PyPI behind the release environment's required reviewer; it waits for approval after the tag is pushed.
• The images currently carry 6.1.28 (web, Jupyter) and 6.1.27 (My Profile), so none can use the above until rebuilt on 6.1.29.

🤖 Generated with Claude Code