Revert Qdrant vectordb support

[qin-ctx]

Description

Revert PR #2350 because the Qdrant backend is not ready to support required directory/path-scope behavior.

This rollback removes the Qdrant VectorDB backend implementation, adapter registration, Qdrant-specific tests, and follow-up Qdrant references that would otherwise import deleted adapter code.

Related Issue

N/A

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• Reverted add Qdrant vectordb support (#2350).
• Removed Qdrant adapter implementation, REST/meta-store collection code, registration, and Qdrant tests.
• Removed Qdrant references from adapter exports and the English/Chinese VectorDB configuration docs.

Testing

• 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
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Tested locally on macOS with:

• ruff and ruff format via pre-commit hooks
• .venv/bin/python -c 'from openviking.storage import vectordb_adapters; from openviking_cli.utils.config.vectordb_config import VectorDBBackendConfig; ...'
• .venv/bin/python -m pytest tests/storage/test_opengauss_adapter.py tests/storage/test_vectordb_adaptor.py tests/misc/test_config_validation.py

Result: 41 passed, 1 skipped.

Checklist

• My code follows the project's coding style
• I have performed a self-review of my 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
• Any dependent changes have been merged and published

Screenshots (if applicable)

N/A

Additional Notes

This PR also removes Qdrant references added by follow-up docs/export changes after #2350, because keeping them would leave broken imports after the adapter files are deleted.

[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis 🔶 2350 - Partially compliant Compliant requirements: (This PR reverts the above requirements) Non-compliant requirements: Add Qdrant as a VectorDB backend Include REST-based Qdrant collection implementation Add adapter registration and backend configuration Add sidecar metadata handling Add tests for Qdrant-specific behavior Requires further human verification: Verify that all Qdrant references are removed Verify that existing functionality works as expected

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🏅 Score: 95

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

[github-actions]

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