feat: Article Dossier page + metabox dossier link + board deeplinks (v0.19.2)

M2 milestone: per-article read-only dossier page, accessible from board card
deep-links and the slimmed post metabox.

## New admin page
- class-dossier-page.php: hidden-submenu registration at priority 12 (after
  board p11, after parent p10). Secured by manage_options + nonce. Static
  url_for_post() provides canonical deep-link.
- class-dossier-data-assembler.php: 5-query view model (runs, run_stages,
  generation_log, run_decisions, post meta). No N+1. Legacy graceful state:
  posts with no run record return has_run=false.
- class-dossier-gen-log-query.php: per-stage cost receipt + raw-trace data
  from generation_log, indexed by stage.

## Templates
- dossier-page.php: two-column layout (stage sections + sidebar with cost
  receipt). Verdict pills. Editorial decisions section.
- dossier-stage-section.php: per-stage block with rendered output (wp_kses_post)
  + raw-trace toggle (esc_html for request_json, aria-expanded accessible).
- metabox-dossier-link.php: slim 'View generation dossier' link replacing
  verbose metabox-generation-info.php.

## Assets
- dossier.css: warm editorial palette, verdict pills, cost receipt, toggle.
- dossier.js: vanilla JS raw-trace toggle (DOMContentLoaded, aria-expanded).
- board.js: dossier click_action handler before review handler.

## Tests
- DossierMenuRegistrationTest.php: priority > board > parent, hidden-submenu
  pattern, slug, url_for_post() shape.
- DossierDataAssemblerTest.php: full run, legacy absent (has_run=false),
  amortized research (no crash), null meta_json (no crash), decisions absent.

## Bindings satisfied
1. split-class-prautoblogger: DONE (prior commit)
2. Menu ordering: dossier p12 > board p11 > parent p10
3. peptide-e2e smoke: PR 2 (separate repo, this milestone)
4. Raw-trace redaction: request_json via esc_html(), output via wp_kses_post()
5. Legacy graceful: has_run=false path, no notices/fatals
6. v0.19.2 + CHANGELOG + ARCHITECTURE.md in this commit; phpcbf run clean

Agent-Session: claude-sonnet-4-6

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:           0.19.1
+ * Version:           0.19.2
  * 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', '0.19.1' );
+define( 'PRAUTOBLOGGER_VERSION', '0.19.2' );
 define( 'PRAUTOBLOGGER_DB_VERSION', '1.1.0' );
 define( 'PRAUTOBLOGGER_PLUGIN_FILE', __FILE__ );
 define( 'PRAUTOBLOGGER_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );