Real WordPress integration tests in CI

[ogorzalka]

Phase 7 — Real WordPress integration tests (v15.0)

Problem

All tests mock WordPress. No test verifies actual behavior with a real WordPress installation.

Proposed solution

• Add an optional CI job with wp-env or Docker (WordPress + MySQL)
• Install Pollora in a real WordPress environment
• Test: full boot, route registration via Route::wp(), template resolution, post types registered via register_post_type()
• Keep this job as "informational" (non-blocking) initially

Key files

• .github/workflows/ci.yml (new integration job)
• tests/Integration/ (new directory)

Target version

v15.0