PR Vision v0.1.1: rename from peptide-geo-monitor + P2 fixes

- Exhaustive rename: PGM_ -> PRV_, pgm_ -> prv_, text domain and
  slug peptide-geo-monitor -> pr-vision, admin menu GEO Monitor ->
  PR Vision, main file peptide-geo-monitor.php -> pr-vision.php,
  DB table pgm_ai_visibility -> prv_ai_visibility.
- P2-A: replace ltrim($host,'www.') character-mask with
  str_starts_with/substr prefix strip in PRV_Citation_Detector.
  Adds test coverage for wikipedia.org, webmd.com survival.
- P2-B: drop continue-on-error: true from PHPCS CI step;
  WordPress Coding Standards now gates the build.
- P2-C: remove dead in-run cache from PRV_Probe_Runner::run();
  each (peptide, intent, model) triplet is visited once per run,
  cache hit is structurally impossible.
- Version bump 0.1.0 -> 0.1.1 + CHANGELOG [0.1.1] entry.

Agent-Session: pr-vision rename v0.1.1

includes/core/class-prv-plugin.php

@@ -0,0 +1,41 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Main orchestrator for the PR Vision plugin.
+ *
+ * Boots sub-systems in the correct order, hooks into WP, and keeps
+ * the top-level file under the 300-line limit by delegating all logic
+ * to specialist classes.
+ *
+ * Who triggers: plugins_loaded action (pr-vision.php).
+ * Dependencies: PRV_Cron, PRV_Admin_Page, PRV_Collector_Registry.
+ *
+ * @see ARCHITECTURE.md — Boot sequence diagram.
+ * @package PrVision
+ */
+class PRV_Plugin {
+
+	/**
+	 * Wire up all WordPress hooks.
+	 *
+	 * Side effects: Registers admin menus, enqueues assets, and registers the
+	 *               collector/panel registry.
+	 *
+	 * @return void
+	 */
+	public function init(): void {
+		$cron = new PRV_Cron();
+		$cron->register_hooks();
+
+		if ( is_admin() ) {
+			$page = new PRV_Admin_Page();
+			$page->register_hooks();
+		}
+
+		// Register the v1 AI-visibility collector + panel.
+		$registry = PRV_Collector_Registry::instance();
+		$registry->register_collector( new PRV_Ai_Visibility_Collector() );
+		$registry->register_panel( 'ai_visibility', new PRV_Ai_Visibility_Panel() );
+	}
+}