0.10.0

The last structural debt before 1.0 (spec 17 §7): the reader registry of Attribute\ParamExtractor was process-wide static
state — two graphs in one process shared it, a test had to unregister what another registered, and nothing in the type
system said which extractor a resolver read with. It is an object now, built once per graph and injected.

Changed

• Attribute\ParamExtractor is an instance (tier Call; constructors take named arguments): new ParamExtractor(...$readers)
  holds the SubjectReaderInterfaces of the graph; extract(), read(), resolve() and condition() are instance methods
  with unchanged signatures; with(...$readers) returns a copy with more readers, fromReaders(iterable) builds one for a
  container, readers() lists them. Removed: the static registerReader() / unregisterReader(). Migration: plain PHP
  — IndexNowKit::create($config, extractor: new ParamExtractor(new MyReader())); a call site that used the static methods —
  (new ParamExtractor())->read(...) (the DSL alone) or the graph's instance ($indexNow->extractor). The adapters bind
  theirs (ParamExtractor::class in Laravel, indexnowkit.param_extractor in Symfony, ServicesBuilder::paramExtractor()
  in Yii2) and their EloquentSubjectReader / ActiveRecordSubjectReader go in there.
• A FieldCondition is evaluated through the extractor: ParamExtractor::condition() reads field() with its readers
  and asks heldFor(), so new Equals('status', 'published') sees an Eloquent attribute the same way params does; a plain
  Condition still runs evaluate($subject). Equals::evaluate() alone reads with the plain DSL (it was the static
  registry before); the core never calls it for a FieldCondition. The "no property, getter or method" error says "give the
  ParamExtractor a SubjectReaderInterface" and lists the readers that were asked.

Added

• Appended optional parameters carrying the extractor: IndexNowKit::create(..., ?ParamExtractor $extractor), the
  constructor of IndexNowKit (public readonly ParamExtractor $extractor), Url\AttributeUrlResolver (constructor and
  fromConfig(), plus extractor()), Url\ObjectChangeHandler, Attribute\UrlRule::appliesTo(object, ?ParamExtractor),
  Attribute\ChangeClassifier::classify(..., ?ParamExtractor). Null everywhere means the plain DSL, which is what plain PHP
  objects and Doctrine entities need — nothing changes for them.
• Adapter\Services::paramExtractor() and Adapter\ServicesBuilder::paramExtractor(ParamExtractor|Closure): the
  node the resolver, the change handler and the facade of the graph share.
• docs/compatibility.md: the supported PHP and framework versions per package, their upstream end-of-life dates and the rule
  for dropping one (the minimum PHP is raised in the first minor after the previous version leaves security support; that
  is not a breaking change under docs/bc.md).