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-activator.php

@@ -0,0 +1,32 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Plugin activation handler.
+ *
+ * Creates the custom database table via dbDelta and registers the weekly
+ * WP-Cron probe schedule. Safe to call on re-activation — dbDelta is
+ * idempotent and the cron schedule is only added when absent.
+ *
+ * Who triggers: register_activation_hook() in pr-vision.php.
+ * Dependencies: PRV_Table_Manager, PRV_Cron, PRV_Config.
+ *
+ * @see class-prv-table-manager.php — Database schema creation.
+ * @see class-prv-cron.php          — Cron scheduling.
+ * @package PrVision
+ */
+class PRV_Activator {
+
+	/**
+	 * Run all activation tasks.
+	 *
+	 * Side effects: Creates DB table, writes default options, schedules cron.
+	 *
+	 * @return void
+	 */
+	public static function activate(): void {
+		PRV_Table_Manager::create_table();
+		PRV_Config::seed_defaults();
+		PRV_Cron::schedule_weekly();
+	}
+}