ClassMethodsParametersCountCheck

Validates that the number of parameters in stub methods matches reflection.

For each class identified by $entityId the validator:

1. Iterates all methods reported by reflection for the class.
2. Looks up each method in the version-filtered stub hierarchy (parent classes and interfaces), stripping PS_UNRESERVEPREFIX where needed.
3. If the stub method is not found it is silently skipped — existence is ClassMethodsExistCheck's responsibility.
4. When both sides are found, the stub parameter list is filtered by version (PhpStormStubsElementAvailable from/to → sinceVersion/removedVersion) and the resulting count is compared with the reflection count.

Parameter version filtering uses inclusive boundaries for removedVersion (<=), consistent with how PhpStormStubsElementAvailable to is interpreted elsewhere (e.g. to: '7.1' means the parameter is still available in PHP 7.1).

Parameters are deduplicated by name after version filtering. When a version-bounded placeholder and a variadic share the same name (e.g. a to: '7.4' placeholder $vars followed by ...$vars), they represent a single mandatory variadic parameter and are counted once.

Known problems are supported at two granularities:

• class-level: EntityType::CLASS_TYPE + classId + 'ParametersCountCheck' → skips all parameter-count checks for the class.
• method-level: EntityType::METHOD + '\ClassName::methodName' + 'ParametersCountCheck' → skips only that specific mismatch.