Add DTO and DTO Collection for GetAllUserPost use case

[zigzagdev]

Description

This pull request introduces the following data transfer objects to represent post data returned from the GetAllUserPost use case:

• GetAllUserPostDto: A readonly value object encapsulating an individual post's ID, user ID, content, optional media path, and visibility status.
• GetAllUserPostDtoCollection: A typed collection of GetAllUserPostDto instances, designed to standardise the output of multiple post entities in a structured format.

Implementation Details

• GetAllUserPostDto includes a static build() method to construct an instance from a flat array, and a toArray() method for serialisation purposes.
• GetAllUserPostDtoCollection wraps an array of DTOs and provides a build() factory for consistency with DDD-style instantiation.

[zigzagdev]

• Confirmed that all fields in GetAllUserPostDto are strictly typed and immutable (readonly).
• Verified that build() methods in both DTO and Collection validate the input structure as expected.
• Ensured compatibility with existing application layers by keeping userId and mediaPath naming consistent.
• Unit tests comprehensively cover both normal and edge cases, including missing mediaPath.
• Considered future extensibility by avoiding premature abstraction (no factory class for now — inline static method suffices).

[Copilot]

Pull Request Overview

This PR introduces DTO classes for the GetAllUserPost use case, providing structured value objects and a collection wrapper.

• Adds GetAllUserPostDto with build() for instantiation and toArray() for serialization.
• Introduces GetAllUserPostDtoCollection with a build() factory and getPosts() accessor.
• Provides unit tests validating DTO and collection construction and property values.

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

File	Description
src/app/Post/Application/Dto/GetAllUserPostDto.php	Added DTO with constructor, build(), and toArray() methods
src/app/Post/Application/Dto/GetAllUserPostDtoCollection.php	Added collection class with build() factory and getPosts() method
src/app/Post/Application/ApplicationTest/GetAllUserPostDtoTest.php	Added tests for DTO instantiation and value assertions
src/app/Post/Application/ApplicationTest/GetAllUserPostDtoCollectionTest.php	Added tests for collection instantiation and per-item value checks

Files not reviewed (1)

• .idea/workspace.xml: Language not supported

Comments suppressed due to low confidence (6)

src/app/Post/Application/Dto/GetAllUserPostDtoCollection.php:16

• Consider adding a PHPDoc block to build() to describe the expected structure of $items, for example @param array<string,mixed>[] $items to clarify that each element is raw post data.

public static function build(array $items): self

src/app/Post/Application/Dto/GetAllUserPostDto.php:26

• There's no unit test covering toArray()—add a test to assert that toArray() output matches the DTO properties for full serialization coverage.

public function toArray(): array

src/app/Post/Application/ApplicationTest/GetAllUserPostDtoTest.php:10

• [nitpick] The setUp() override is empty and not used—consider removing it to reduce boilerplate in tests.

protected function setUp(): void

src/app/Post/Application/ApplicationTest/GetAllUserPostDtoTest.php:15

• [nitpick] The tearDown() override is empty—consider removing it if there's no custom teardown logic.

protected function tearDown(): void

src/app/Post/Application/ApplicationTest/GetAllUserPostDtoCollectionTest.php:10

• [nitpick] This setUp() method is overridden but empty—removing it can streamline the test class.

protected function setUp(): void

src/app/Post/Application/ApplicationTest/GetAllUserPostDtoCollectionTest.php:15

• [nitpick] This empty tearDown() override isn't used—consider removing it for cleaner test code.

protected function tearDown(): void