feat: Platform isolation, Evomi geo-targeting, proxy management

Platform isolation:
- Rename handlers to {task}-{platform}.ts convention
- Deprecate -curl variants (now _deprecated-*)
- Platform-based routing in task-worker.ts
- Add Jane platform handlers and client

Evomi geo-targeting:
- Add dynamic proxy URL builder with state/city targeting
- Session stickiness per worker per state (30 min)
- Fallback to static proxy table when API unavailable
- Add proxy tracking columns to worker_tasks

Proxy management:
- New /proxies admin page for visibility
- Track proxy_ip, proxy_geo, proxy_source per task
- Show active sessions and task history

Validation filtering:
- Filter by validated stores (platform_dispensary_id + menu_url)
- Mark incomplete stores as deprecated
- Update all dashboard/stats queries

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/routes/pipeline.ts

@@ -982,19 +982,24 @@ router.get('/stats', async (_req: Request, res: Response) => {
       GROUP BY stage
     `);
 
-    // Dispensaries by stage
+    // Dispensaries by stage (only validated stores)
     const { rows: dispensaryStats } = await pool.query(`
       SELECT stage, COUNT(*) as count
       FROM dispensaries
-      WHERE crawl_enabled = true
+      WHERE platform_dispensary_id IS NOT NULL
+        AND menu_url IS NOT NULL
+        AND (stage IS NULL OR stage != 'deprecated')
       GROUP BY stage
     `);
 
-    // By state for dispensaries
+    // By state for dispensaries (only validated stores)
     const { rows: byState } = await pool.query(`
       SELECT state, stage, COUNT(*) as count
       FROM dispensaries
-      WHERE crawl_enabled = true AND state IS NOT NULL
+      WHERE state IS NOT NULL
+        AND platform_dispensary_id IS NOT NULL
+        AND menu_url IS NOT NULL
+        AND (stage IS NULL OR stage != 'deprecated')
       GROUP BY state, stage
       ORDER BY state, stage
     `);