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/discovery/promotion.ts

@@ -388,6 +388,9 @@ async function promoteLocation(
       country = EXCLUDED.country,
       status = EXCLUDED.status,
       dutchie_discovery_id = EXCLUDED.dutchie_discovery_id,
+      dutchie_verified = TRUE,
+      dutchie_verified_at = COALESCE(dispensaries.dutchie_verified_at, CURRENT_TIMESTAMP),
+      crawl_enabled = COALESCE(dispensaries.crawl_enabled, TRUE),
       last_modified_at = EXCLUDED.last_modified_at,
       last_modified_by_task = EXCLUDED.last_modified_by_task,
       last_modified_task_id = EXCLUDED.last_modified_task_id,