feat: Stealth worker system with mandatory proxy rotation

## Worker System
- Role-agnostic workers that can handle any task type
- Pod-based architecture with StatefulSet (5-15 pods, 5 workers each)
- Custom pod names (Aethelgard, Xylos, Kryll, etc.)
- Worker registry with friendly names and resource monitoring
- Hub-and-spoke visualization on JobQueue page

## Stealth & Anti-Detection (REQUIRED)
- Proxies are MANDATORY - workers fail to start without active proxies
- CrawlRotator initializes on worker startup
- Loads proxies from `proxies` table
- Auto-rotates proxy + fingerprint on 403 errors
- 12 browser fingerprints (Chrome, Firefox, Safari, Edge)
- Locale/timezone matching for geographic consistency

## Task System
- Renamed product_resync → product_refresh
- Task chaining: store_discovery → entry_point → product_discovery
- Priority-based claiming with FOR UPDATE SKIP LOCKED
- Heartbeat and stale task recovery

## UI Updates
- JobQueue: Pod visualization, resource monitoring on hover
- WorkersDashboard: Simplified worker list
- Removed unused filters from task list

## Other
- IP2Location service for visitor analytics
- Findagram consumer features scaffolding
- Documentation updates

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

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

backend/migrations/076_visitor_analytics.sql

@@ -0,0 +1,71 @@
+-- Visitor location analytics for Findagram
+-- Tracks visitor locations to understand popular areas
+
+CREATE TABLE IF NOT EXISTS visitor_locations (
+  id SERIAL PRIMARY KEY,
+
+  -- Location data (from IP lookup)
+  ip_hash VARCHAR(64),           -- Hashed IP for privacy (SHA256)
+  city VARCHAR(100),
+  state VARCHAR(100),
+  state_code VARCHAR(10),
+  country VARCHAR(100),
+  country_code VARCHAR(10),
+  latitude DECIMAL(10, 7),
+  longitude DECIMAL(10, 7),
+
+  -- Visit metadata
+  domain VARCHAR(50) NOT NULL,    -- 'findagram.co', 'findadispo.com', etc.
+  page_path VARCHAR(255),         -- '/products', '/dispensaries/123', etc.
+  referrer VARCHAR(500),
+  user_agent VARCHAR(500),
+
+  -- Session tracking
+  session_id VARCHAR(64),         -- For grouping page views in a session
+
+  -- Timestamps
+  created_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+-- Indexes for analytics queries
+CREATE INDEX IF NOT EXISTS idx_visitor_locations_domain ON visitor_locations(domain);
+CREATE INDEX IF NOT EXISTS idx_visitor_locations_city_state ON visitor_locations(city, state_code);
+CREATE INDEX IF NOT EXISTS idx_visitor_locations_created_at ON visitor_locations(created_at);
+CREATE INDEX IF NOT EXISTS idx_visitor_locations_session ON visitor_locations(session_id);
+
+-- Aggregated daily stats (materialized for performance)
+CREATE TABLE IF NOT EXISTS visitor_location_stats (
+  id SERIAL PRIMARY KEY,
+  date DATE NOT NULL,
+  domain VARCHAR(50) NOT NULL,
+  city VARCHAR(100),
+  state VARCHAR(100),
+  state_code VARCHAR(10),
+  country_code VARCHAR(10),
+
+  -- Metrics
+  visit_count INTEGER DEFAULT 0,
+  unique_sessions INTEGER DEFAULT 0,
+
+  UNIQUE(date, domain, city, state_code, country_code)
+);
+
+CREATE INDEX IF NOT EXISTS idx_visitor_stats_date ON visitor_location_stats(date);
+CREATE INDEX IF NOT EXISTS idx_visitor_stats_domain ON visitor_location_stats(domain);
+CREATE INDEX IF NOT EXISTS idx_visitor_stats_state ON visitor_location_stats(state_code);
+
+-- View for easy querying of top locations
+CREATE OR REPLACE VIEW v_top_visitor_locations AS
+SELECT
+  domain,
+  city,
+  state,
+  state_code,
+  country_code,
+  COUNT(*) as total_visits,
+  COUNT(DISTINCT session_id) as unique_sessions,
+  MAX(created_at) as last_visit
+FROM visitor_locations
+WHERE created_at > NOW() - INTERVAL '30 days'
+GROUP BY domain, city, state, state_code, country_code
+ORDER BY total_visits DESC;