Enforce MinHash construction compatibility

[dipeshbabu]

What

Fingerprint the actual permutation matrix and hash callable, then enforce those fingerprints in MinHash operations and all LSH variants.

Why

Sketches with the same seed, length, and scheme can still be incompatible when callers provide different permutations or hash functions. Comparing or indexing them together silently produces invalid similarity results.

Impact

Jaccard, merge, union, LSH, async LSH, LSH Forest, and LSH Bloom now fail clearly when known construction metadata differs. WeightedMinHash remains exempt, and old indexes carrying only scheme metadata remain readable.

Root cause

Compatibility checks treated the seed as a complete identity for permutation generation and did not track the input hash function.

Checks

• uv run pytest -q test/test_minhash.py test/test_minhash_schemes.py test/test_lsh.py test/test_lshforest.py (119 passed)
• uv run pytest -q test/test_lshbloom.py (9 skipped; optional dependency unavailable)
• uv run ruff check on changed Python files
• uvx pyright (0 errors)
• git diff --check

[dipeshbabu]

Superseded by upstream pull request ekzhu#326.