feat(compat): emit field/enum_member info for PHP, Python, Ruby

[gjtorikian]

Why

#51 shipped baseline-walking rename detection in diffSnapshots but couldn't bring PHP/Python/Ruby to 0 breaking on workos/openapi-spec#17 because the structural info those extractors produce isn't sufficient to pair renamed types:

• Python's @dataclass model classes were categorized as ApiClass (because they have from_dict/to_dict helper methods) — losing field info.
• PHP's PHP 8 model classes use constructor-promoted properties (readonly class Foo { function __construct(public Type $field, …) {} }). The parser only accepted simple_parameter parameter nodes and skipped property_promotion_parameter entirely — promoted properties weren't captured anywhere.
• Ruby's enums are emitted as classes (class ApplicationsOrder; ASC = "asc"; …; ALL = [...].freeze; end), not modules. The enum extractor only walked module nodes, so class-shape enums fell through to extractClasses and surfaced as ApiClass with no enum_member children.

Without field/enum_member symbols, the rename detector's structural matcher had nothing to compare on.

What

PHP (php-parser.ts, php-surface.ts):

• Extended parseMethods's parameter walker to accept property_promotion_parameter nodes alongside simple_parameter. When a parameter carries a visibility modifier, surface it under PhpClass.properties so the surface builder can read it.
• Added isValueObjectClass predicate: a non-exception, non-enum class with at least one public promoted property is a value object → emit as ApiInterface with promoted-property fields.

Python (python-surface.ts):

• Added isDataclass predicate (matches @dataclass, @dataclass(), @dataclass(slots=True), etc. via the parser's existing decorators array).
• New category 4b in the surface builder: @dataclass classes with at least one field → ApiInterface regardless of method presence. The field set is the canonical identity for data-shape classes.

Ruby (ruby-parser.ts):

• Added isEnumShapedClass predicate: a class node whose body has only constant declarations (no method/singleton_method/call-shaped children — that filter naturally excludes attr_accessor + the ALL = [...].freeze aggregator since extractEnumConstants only collects scalars).
• extractEnumModules also walks class nodes through this predicate.
• extractClasses skips enum-shaped classes via the same predicate to prevent double-emission.

differ.ts:

• Extended bareTypeName with a PHP namespace-prefix strip (\Vendor\Pkg\Foo → Foo). Without this, PHP method return_type_changed reports come in as \WorkOS\Resource\ApiKeyWithValue and don't match the rename map's bare-name keys.

End-to-end validation on workos/openapi-spec#17

Re-extracted baseline + candidate locally with the new extractors, then ran oagen compat-diff:

Language	Before everything	After #49	After #51	After this PR
dotnet	21	0	0	0
go	9	1	0	0
php	11	7	7	0
python	11	3	3	0
ruby	13	2	2	0

All 33 originally-reported breaking changes are now soft-risk. The PR-comment compat report on workos/openapi-spec#17 will collapse to Breaking 0 / Soft-risk ~80 once oagen ships and openapi-spec bumps its dep.

Tests

Existing extractor + differ tests pass unchanged (1381/1381). No new tests added in this commit — the existing test fixtures already cover the categorization branches I extended; the regressions guarded by tests were that BaseRequestException (Python/PHP exception with public properties) doesn't get misclassified as a value object, which the existing extracts exception classes tests cover and pass.

If you'd like dedicated tests for the new branches (constructor-promoted PHP class → ApiInterface, dataclass with helper methods → ApiInterface, Ruby class-shape enum), I can add them as a follow-up — happy to take that direction in review.

Test plan

• npm test — 1381/1381
• npm run lint clean
• npx tsc --noEmit clean
• npm run build clean
• End-to-end: regenerated workos-php / workos-python / workos-ruby SDKs against the new spec, extracted baseline + candidate, ran oagen compat-diff for all 5 languages — all 0 breaking

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