fix: Resolve type inconsistencies in filter methods

- Fix sole() method to use filterStrict() for static return type consistency
- Fix reject() method to use filterStrict() since it returns static
- Fix ValueObjectList remove() and diff() methods to use filterStrict()
- Ensures type safety between filter() (returns self) and filterStrict() (returns static)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: kakiuchi-shigenao <endou-mame@users.noreply.github.com>

Author: claude[bot]

src/Collection/ArrayList.php

@@ -253,7 +253,7 @@ final public function firstOrFail(?Closure $closure = null)
     #[Override]
     final public function sole(?Closure $closure = null)
     {
-        $items = $closure === null ? new static($this->elements) : $this->filter($closure);
+        $items = $closure === null ? new static($this->elements) : $this->filterStrict($closure);
         $count = $items->count();
 
         if ($count === 0) {
@@ -352,7 +352,7 @@ final public function filterStrict(Closure $closure): static
     #[Override]
     final public function reject(Closure $closure): static
     {
-        return $this->filter(static fn ($value, $key) => !$closure($value, $key));
+        return $this->filterStrict(static fn ($value, $key) => !$closure($value, $key));
     }
 
     #[Override]

src/ValueObjectList.php

@@ -27,7 +27,7 @@ public function has(IValueObject $element): bool
      */
     public function remove(IValueObject $element): static
     {
-        return $this->filter(static fn (IValueObject $e) => !$e->equals($element));
+        return $this->filterStrict(static fn (IValueObject $e) => !$e->equals($element));
     }
 
     /**
@@ -45,6 +45,6 @@ public function put(IValueObject $element): static
      */
     public function diff(self $other): static
     {
-        return $this->filter(static fn (IValueObject $e) => !$other->has($e));
+        return $this->filterStrict(static fn (IValueObject $e) => !$other->has($e));
     }
 }