[fabclmnt]

This PR removes the dependency on visions to reduce external maintenance overhead and avoid potential licensing compatibility issues.

[Copilot]

🟡 Changes recommended

Tracing can mutate inference state and alter type-selection paths, while the date checks misclassify columns containing missing-date strings, losing date statistics and missing-value counts.

2 open issues

• Prevent tracing predicates from mutating inference state · New
• Preserve date inference for columns with missing-date strings · New

What changed in this PR

Replaces visions with a built-in type system to reduce dependency maintenance and licensing concerns while supporting profiling and custom types.

Changes:

• Adds deterministic type precedence, inference tracing, and single-pass inference and casting.
• Migrates report handlers and tests to the built-in types, with new reference data and snapshot tooling.
• Removes the dependency and updates type-inference documentation.

File	Description
tests/​unit/​typeset_test_utils.py	Adds local membership, inference, and conversion helpers.
tests/​unit/​typeset_sequences.py	Adds independent reference series.
tests/​unit/​test_utils.py	Removes the obsolete visions workaround.
tests/​unit/​test_typeset_precedence.py	Tests precedence, structure, and handler inheritance.
tests/​unit/​test_typeset_default.py	Migrates default typeset tests to local helpers.
tests/​unit/​test_typeset_custom.py	Migrates custom typeset tests to local helpers.
tests/​typeset_snapshot.py	Adds inference snapshot recording and comparison.
src/​data_profiling/​profile_report.py	Adopts the built-in typeset interface.
src/​data_profiling/​model/​typeset.py	Defines built-in profiling types and precedence.
src/​data_profiling/​model/​typeset_relations.py	Uses local null handling and revises date inference.
src/​data_profiling/​model/​typeset_base.py	Implements relations, traversal, casting, and tracing.
src/​data_profiling/​model/​summary.py	Updates summary interfaces to built-in typesets.
src/​data_profiling/​model/​summarizer.py	Updates summarizer type interfaces.
src/​data_profiling/​model/​spark/​summary_spark.py	Uses schema-based Spark type detection.
src/​data_profiling/​model/​pandas/​summary_pandas.py	Combines inference and casting into one traversal.
src/​data_profiling/​model/​handler.py	Composes handlers through the built-in type hierarchy.
src/​data_profiling/​model/​describe.py	Updates typeset annotations and documentation.
src/​data_profiling/​expectations_report.py	Migrates expectation handlers and validates typeset availability.
pyproject.toml	Removes the visions dependency.
docs/​reference/​history.md	Updates project history and type-system attribution.
docs/​getting-started/​concepts.md	Documents built-in types, precedence, and tracing.
docs/​features/​sensitive_data.md	Shows explicit text typing for numeric-looking strings.
docs/​features/​metadata.md	Updates schema-inference guidance.

_{Review effort: Balanced}