feat(tasks): Add proxy_test task handler and discovery run tracking

- Add proxy_test task handler that fetches IP via proxy to verify connectivity
- Add discovery_runs migration (083) for tracking store discovery progress
- Register proxy_test in task service and worker

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

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

backend/migrations/083_discovery_runs.sql

@@ -0,0 +1,88 @@
+-- Migration 083: Discovery Run Tracking
+-- Tracks progress of store discovery runs step-by-step
+
+-- Main discovery runs table
+CREATE TABLE IF NOT EXISTS discovery_runs (
+  id SERIAL PRIMARY KEY,
+  platform VARCHAR(50) NOT NULL DEFAULT 'dutchie',
+  status VARCHAR(20) NOT NULL DEFAULT 'running', -- running, completed, failed
+  started_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  finished_at TIMESTAMPTZ,
+  task_id INTEGER REFERENCES worker_task_queue(id),
+
+  -- Totals
+  states_total INTEGER DEFAULT 0,
+  states_completed INTEGER DEFAULT 0,
+  locations_discovered INTEGER DEFAULT 0,
+  locations_promoted INTEGER DEFAULT 0,
+  new_store_ids INTEGER[] DEFAULT '{}',
+
+  -- Error info
+  error_message TEXT,
+
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Per-state progress within a run
+CREATE TABLE IF NOT EXISTS discovery_run_states (
+  id SERIAL PRIMARY KEY,
+  run_id INTEGER NOT NULL REFERENCES discovery_runs(id) ON DELETE CASCADE,
+  state_code VARCHAR(2) NOT NULL,
+  status VARCHAR(20) NOT NULL DEFAULT 'pending', -- pending, running, completed, failed
+  started_at TIMESTAMPTZ,
+  finished_at TIMESTAMPTZ,
+
+  -- Results
+  cities_found INTEGER DEFAULT 0,
+  locations_found INTEGER DEFAULT 0,
+  locations_upserted INTEGER DEFAULT 0,
+  new_dispensary_ids INTEGER[] DEFAULT '{}',
+
+  -- Error info
+  error_message TEXT,
+
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+
+  UNIQUE(run_id, state_code)
+);
+
+-- Step-by-step log for detailed progress tracking
+CREATE TABLE IF NOT EXISTS discovery_run_steps (
+  id SERIAL PRIMARY KEY,
+  run_id INTEGER NOT NULL REFERENCES discovery_runs(id) ON DELETE CASCADE,
+  state_code VARCHAR(2),
+  step_name VARCHAR(100) NOT NULL,
+  status VARCHAR(20) NOT NULL DEFAULT 'started', -- started, completed, failed
+  started_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  finished_at TIMESTAMPTZ,
+
+  -- Details (JSON for flexibility)
+  details JSONB DEFAULT '{}',
+
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Indexes for querying
+CREATE INDEX IF NOT EXISTS idx_discovery_runs_status ON discovery_runs(status);
+CREATE INDEX IF NOT EXISTS idx_discovery_runs_platform ON discovery_runs(platform);
+CREATE INDEX IF NOT EXISTS idx_discovery_runs_started_at ON discovery_runs(started_at DESC);
+CREATE INDEX IF NOT EXISTS idx_discovery_run_states_run_id ON discovery_run_states(run_id);
+CREATE INDEX IF NOT EXISTS idx_discovery_run_steps_run_id ON discovery_run_steps(run_id);
+
+-- View for latest run status per platform
+CREATE OR REPLACE VIEW v_latest_discovery_runs AS
+SELECT DISTINCT ON (platform)
+  id,
+  platform,
+  status,
+  started_at,
+  finished_at,
+  states_total,
+  states_completed,
+  locations_discovered,
+  locations_promoted,
+  array_length(new_store_ids, 1) as new_stores_count,
+  error_message,
+  EXTRACT(EPOCH FROM (COALESCE(finished_at, NOW()) - started_at)) as duration_seconds
+FROM discovery_runs
+ORDER BY platform, started_at DESC;

backend/src/tasks/handlers/index.ts

@@ -9,3 +9,4 @@ export { handleProductDiscovery } from './product-discovery';
 export { handleStoreDiscovery } from './store-discovery';
 export { handleEntryPointDiscovery } from './entry-point-discovery';
 export { handleAnalyticsRefresh } from './analytics-refresh';
+export { handleProxyTest } from './proxy-test';

backend/src/tasks/handlers/proxy-test.ts

@@ -0,0 +1,51 @@
+/**
+ * Proxy Test Handler
+ * Tests proxy connectivity by fetching public IP via ipify
+ */
+
+import { TaskContext, TaskResult } from '../task-worker';
+import { execSync } from 'child_process';
+
+export async function handleProxyTest(ctx: TaskContext): Promise<TaskResult> {
+  const { pool } = ctx;
+
+  console.log('[ProxyTest] Testing proxy connection...');
+
+  try {
+    // Get active proxy from DB
+    const proxyResult = await pool.query(`
+      SELECT host, port, username, password
+      FROM proxies
+      WHERE is_active = true
+      LIMIT 1
+    `);
+
+    if (proxyResult.rows.length === 0) {
+      return { success: false, error: 'No active proxy configured' };
+    }
+
+    const p = proxyResult.rows[0];
+    const proxyUrl = p.username
+      ? `http://${p.username}:${p.password}@${p.host}:${p.port}`
+      : `http://${p.host}:${p.port}`;
+
+    console.log(`[ProxyTest] Using proxy: ${p.host}:${p.port}`);
+
+    // Fetch IP via proxy
+    const cmd = `curl -s --proxy '${proxyUrl}' 'https://api.ipify.org?format=json'`;
+    const output = execSync(cmd, { timeout: 30000 }).toString().trim();
+    const data = JSON.parse(output);
+
+    console.log(`[ProxyTest] Proxy IP: ${data.ip}`);
+
+    return {
+      success: true,
+      proxyIp: data.ip,
+      proxyHost: p.host,
+      proxyPort: p.port,
+    };
+  } catch (error: any) {
+    console.error('[ProxyTest] Error:', error.message);
+    return { success: false, error: error.message };
+  }
+}

backend/src/tasks/task-service.ts

@@ -31,7 +31,8 @@ export type TaskRole =
   | 'product_discovery'
   | 'payload_fetch'      // NEW: Fetches from API, saves to disk
   | 'product_refresh'    // CHANGED: Now reads from local payload
-  | 'analytics_refresh';
+  | 'analytics_refresh'
+  | 'proxy_test';        // Tests proxy connectivity via ipify
 
 export type TaskStatus =
   | 'pending'

backend/src/tasks/task-worker.ts

@@ -59,6 +59,7 @@ import { handleProductDiscovery } from './handlers/product-discovery';
 import { handleStoreDiscovery } from './handlers/store-discovery';
 import { handleEntryPointDiscovery } from './handlers/entry-point-discovery';
 import { handleAnalyticsRefresh } from './handlers/analytics-refresh';
+import { handleProxyTest } from './handlers/proxy-test';
 
 const POLL_INTERVAL_MS = parseInt(process.env.POLL_INTERVAL_MS || '5000');
 const HEARTBEAT_INTERVAL_MS = parseInt(process.env.HEARTBEAT_INTERVAL_MS || '30000');
@@ -133,6 +134,7 @@ const TASK_HANDLERS: Record<TaskRole, TaskHandler> = {
   store_discovery: handleStoreDiscovery,
   entry_point_discovery: handleEntryPointDiscovery,
   analytics_refresh: handleAnalyticsRefresh,
+  proxy_test: handleProxyTest,             // Tests proxy via ipify
 };
 
 /**