[Feature] vendor dldb 1.0.0 with pinned lance stack for public installs

[Fantasy97]

Summary

• Vendor upstream dldb as packages/dldb (dldb==1.0.0, runtime core only).
• Remove the private Gitee git dependency; default installs use the in-repo package (uv path source / pip editable ./packages/dldb).
• Pin the Lance stack in dldb to reduce cross-environment nested-trajectory read failures.

Compatibility guidance

Writer/reader compatibility is primarily gated by lancedb / pylance. This PR constrains dldb to the validated band: Python >=3.10,<3.13, lancedb>=0.34,<0.35, pylance>=9,<10, plus pandas/pyarrow ranges. Keep writer and reader on the same Lance generation; reinstall existing envs after upgrading; validate nested R/W before bumping Lance majors.

Updating dldb later

• In-repo default: update packages/dldb, bump its version/pins, then uv pip install -e ".[dev]" (or pip: install ./packages/dldb then ".[dev]").
• Explicit GitHub override: pip install -U "dldb @ git+https://github.com/<org>/dldb.git@v1.0.0" then pip install -e ".[dev]".