ci: adopt estate reusable CI + split 300-line violations (v0.22.0)

- ci.yml → thin caller of peptide-e2e reusable CI (tests: brain-monkey)
  + keep check-constants as parallel job; workflow_call trigger enabled
- deploy.yml: retire standalone validate job; gate on ci.yml via workflow_call
- composer.json: add 'test' script (vendor/bin/phpunit --testdox)
- Version bumped to 0.22.0

300-line splits (9 files over limit → all under 300):
- class-keyword-extractor.php: shared tokeniser from Idea_Scorer + Semantic_Dedup
- class-image-aspect-ratio.php: aspect-ratio snap from OR provider + OR batch
- class-settings-sanitizer.php: option sanitization from Admin_Page
- class-settings-fields-images.php: image fields from Settings_Fields_Extended
- class-runware-image-validator.php: credential check from Runware_Image_Provider
- Runware batch: 15 phpcs:disable lines → 1 grouped suppression

Agent-Session: claude/adopt-ci-20260616

prautoblogger.php

@@ -9,7 +9,7 @@
  * Plugin Name:       PRAutoBlogger
  * Plugin URI:        https://peptiderepo.com/prautoblogger
  * Description:       Monitors social media for trending topics, generates SEO-friendly blog posts using AI, and publishes them on a daily schedule with full cost tracking and self-improvement metrics.
- * Version:           0.21.0
+ * Version:           0.22.0
  * Requires at least: 6.0
  * Requires PHP:      7.4
  * Author:            PeptideRepo
@@ -35,7 +35,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 | Defined here so every file in the plugin can reference paths, versions,
 | and limits without magic strings.
 */
-define( 'PRAUTOBLOGGER_VERSION', '0.21.0' );
+define( 'PRAUTOBLOGGER_VERSION', '0.22.0' );
 define( 'PRAUTOBLOGGER_DB_VERSION', '1.4.0' );
 define( 'PRAUTOBLOGGER_DEFAULT_RUN_CEILING_USD', 0.50 );
 define( 'PRAUTOBLOGGER_DEFAULT_REQUEST_JSON_RETENTION_DAYS', 14 );