Update licensing to MIT License

[dfeen87]

Successfully updated the repository licensing from PolyForm Noncommercial to the MIT License, updated all source file headers, updated README.md, updated CITATION.cff, and updated api/openapi.yaml.

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PR created automatically by Jules for task 17515081964158020204 started by @dfeen87

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[Copilot]

Pull request overview

This PR updates the project’s licensing from PolyForm Noncommercial to the MIT License, aligning repository metadata and documentation with the new license and updating source-file headers accordingly.

Changes:

• Replaced the repository LICENSE text with the MIT License and updated README licensing language/badges.
• Updated Python source/test file headers to reference the MIT License (and add copyright notice).
• Updated licensing metadata in CITATION.cff and api/openapi.yaml.

Reviewed changes

Copilot reviewed 32 out of 32 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/schema_linter.py	Updates file header to MIT License.
tools/migration_helper.py	Updates file header to MIT License.
tests/test_validation.py	Updates test module header to MIT License.
tests/test_security_robustness.py	Updates test module header to MIT License.
tests/test_schema.py	Updates test module header to MIT License.
tests/test_query.py	Updates test module header to MIT License.
tests/test_api.py	Updates test module header to MIT License.
tests/run_tests.py	Updates script header to MIT License.
tests/api/test_endpoints.py	Updates test module header to MIT License.
tests/init.py	Updates package header to MIT License.
README.md	Updates licensing badge/text and license section copy to MIT.
query/query_builder.py	Updates module header to MIT License.
query/predicates.py	Updates module header to MIT License.
query/filters.py	Updates module header to MIT License.
query/explain.py	Updates module header to MIT License.
query/init.py	Updates module header to MIT License.
LICENSE	Replaces PolyForm Noncommercial text with MIT License text.
indexer/serialize.py	Updates module header to MIT License.
indexer/index_text.py	Updates module header to MIT License.
indexer/adapters.py	Updates module header to MIT License.
indexer/init.py	Updates module header to MIT License.
core/validate.py	Updates module header to MIT License.
core/normalize.py	Updates module header to MIT License.
core/errors.py	Updates module header to MIT License.
core/descriptor.py	Updates module header to MIT License.
core/init.py	Updates module header to MIT License.
CITATION.cff	Updates license field (and author naming metadata).
api/storage.py	Updates module header to MIT License.
api/openapi.yaml	Updates OpenAPI license metadata to MIT.
api/main.py	Updates module header to MIT License.
api/embeddings.py	Updates module header to MIT License.
api/config.py	Updates module header to MIT License.

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