[JingsongLi]

Purpose

Restore Python and Native regression coverage after separating public APIs from execution backends:

• Make deferred vector and full-text factories pickleable while preserving captured query configuration and lazy executor construction.
• Preserve the original commit error when the optional Rust conflict exception is unavailable.
• Use the vector SDK batch ABI for a single query too, preserving short results when null vectors or deletion vectors leave fewer than K matches.
• Check custom query authorization before raw/all-file Native planning and preserve cached restrictions when access is denied.

Align backend guards, public updater wrapper checks and lazy-import mocks with the current execution classes, retaining data, cleanup, file-layout and no-fallback assertions. Correct the stale-bucket injection target and late write-type error expectation. Set DAFT_RUNNER=native in Native CI to avoid retaining an inferred Ray runner across test cluster shutdowns; explicit Ray-runner tests remain covered.

For the malformed Lance descriptor fixture, use only the Python writer to seed invalid legacy bytes. Native planning/reading, export rejection and create/overwrite atomicity assertions remain enabled and independently verified.

Dependencies: Native CI builds paimon-rust main and needs apache/paimon-rust#1211 for three indexed partition-filter cases. Rust's advisory gate independently needs apache/paimon-rust#1212. Final local Native validation uses the wheel built from vector-fix commit 188a754573f90d113a560345edea126e999cb5f1.

Tests

• Full Python 3.10 suite without Rust: 10,635 passed, 705 skipped, 11,755 native cases deselected, exit status 0.
• Full Native suite with all five execution flags, the Rust vector fix and the CI runner setting: 23,016 passed, 89 skipped, exit status 0. Native execution counters: 23,508 plans; 19,617 reads; 20,054 writes; 3,621 commits; all seven update kinds exercised.
• Lance 13.0.0 with Native plan/read/write enabled: 120 passed after reproducing and fixing the two malformed-fixture setup failures. Independent verification confirmed both cases reach export validation using Native plan/read and retain destination atomicity.
• LeRobot 0.6.0 and 0.6.1: 145 passed each. PyArrow 22 nested MAP field names: 12 passed, 2 capability skips. Torch: 71 passed. Temporal/LeRobot targeted regression: 40 passed; non-UTC temporal casts and golden timestamp serialization passed. Packaging: 9 passed.
• Community CI on the initial implementation commit passed Python 3.6.15/3.7/3.10/3.11/3.12/3.13, all four PyArrow compatibility versions, all three LeRobot versions, Torch, packaging and Ray compatibility. Its Native job exposed the three Rust dependency failures and the two Lance fixture failures addressed above; the fixture-only follow-up has been pushed.
• Java prerequisites passed with default checks and JDK 8. Java/Python interoperability: 30 groups passed; 2 Lumina groups cannot load native libraries on this macOS ARM host. Lumina Python wheels are also unavailable for this host.
• License headers, Flake8, git diff --check and independent review passed.

Local full-suite runs used macOS ARM, Python 3.10 without Rust and Python 3.13 with Rust. Lance/LeRobot supplemental runs used PyArrow 22. Skips include unavailable cloud credentials/native libraries and version-specific checks; Lance and timezone cases were exercised separately.

[leaves12138]

LGTM