[harsh21234i]

Fixes #7830 by preserving model registration order when combining metadata from multiple model bases. If separate metadata objects define the same table, the registry now raises a clear InvalidRequestError instead of silently selecting one definition.

Regression coverage verifies deterministic ordering through register(), ordering after a model is removed and re-registered, duplicate table detection, and preservation of convention-generated constraint names.

Testing:

• uv run pytest tests/units/test_model.py tests/units/utils/test_migrations.py -q — 60 passed.
• Ruff format/check, codespell, and Pyright passed for the changed files.
• The full unit suite on Windows reported 15,064 passed, 85 skipped, and 21 failures in platform-sensitive/unrelated tests (including symlink privilege limitations).

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The follow-up change appears safe to merge.

Summary

The PR makes database table merging predictable and rejects conflicting table definitions.

• Model metadata follows registration order and a stable order for detected bases.
• Metadata merging names both model bases when separate bases claim one table.

The earlier test concern is addressed: the ordering test now calls register(). No new actionable issues were found in the follow-up change.

_{Reviews (3) · Last reviewed commit: "perf: avoid scanning model registry on r..." · Reviewed by Greptile}

[cubic-dev-ai]

All reported issues were addressed across 3 files

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[codspeed]

Merging this PR will not alter performance

1 warning

⚠️ 17 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

✅ 143 untouched benchmarks
⏩ 8 skipped benchmarks¹

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_{Comparing harsh21234i:fix/7830-deterministic-model-metadata (701bd6d) with main (8e5bb84)}

Footnotes

1. 8 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩