Flatten repo structure: move crawler/ to root, remove vqa/ and immoweb/

The crawler subdirectory was the only active project. Moving it to the
repo root simplifies paths and removes the unnecessary nesting. The
vqa/ and immoweb/ directories were legacy/unused and have been removed.

Updated .drone.yml, .gitignore, .claude/ docs, and skills to reflect
the new flat structure.

.env.sample

@@ -0,0 +1,43 @@
+# Copy me to .env and source me
+
+export ROUTING_API_KEY="<CHANGE ME>" # fetch from https://console.cloud.google.com/google/maps-apis/; prices - https://developers.google.com/maps/billing-and-pricing/pricing
+
+# export DB_CONNECTION_STRING="mysql://wrongmove:wrongmove@localhost:3306/wrongmove" # example for mysql
+export DB_CONNECTION_STRING="sqlite:///data/wrongmove.db" # by default use SQLite locally
+export CELERY_BROKER_URL="redis://localhost:6379/0" # processing background tasks
+export CELERY_RESULT_BACKEND="redis://localhost:6379/1"
+
+# Rightmove scraper configuration
+# These settings control query splitting to work around Rightmove's ~1500 result cap
+RIGHTMOVE_MAX_CONCURRENT=5        # Max concurrent HTTP requests
+RIGHTMOVE_REQUEST_DELAY_MS=100    # Delay between requests in milliseconds
+RIGHTMOVE_SPLIT_THRESHOLD=1200    # Split query when results exceed this threshold
+RIGHTMOVE_MIN_PRICE_BAND=100      # Minimum price band width (won't split below this)
+RIGHTMOVE_MAX_PAGES=60            # Max pages per subquery (60 * 25 = 1500 max results)
+RIGHTMOVE_PROXY_URL=              # Optional SOCKS proxy URL (e.g., socks5://localhost:9050 for Tor)
+
+# Throttling detection and circuit breaker
+RIGHTMOVE_SLOW_RESPONSE_THRESHOLD=10.0  # Response time threshold in seconds
+RIGHTMOVE_ENABLE_CIRCUIT_BREAKER=true   # Enable circuit breaker protection
+RIGHTMOVE_CIRCUIT_BREAKER_FAILURES=5    # Consecutive failures to open circuit
+RIGHTMOVE_CIRCUIT_BREAKER_TIMEOUT=60.0  # Seconds to wait before recovery attempt
+
+# Periodic scraping schedules (JSON array)
+# Each schedule has: name, enabled, hour, minute, day_of_week, listing_type, min/max_bedrooms, min/max_price, district_names, furnish_types
+# Cron fields: minute (0-59), hour (0-23), day_of_week (0-6, 0=Sunday)
+# Example:
+# SCRAPE_SCHEDULES='[{"name":"Daily RENT","listing_type":"RENT","hour":"2","min_bedrooms":2,"max_bedrooms":3,"min_price":2000,"max_price":4000}]'
+# Multiple schedules:
+# SCRAPE_SCHEDULES='[{"name":"RENT 2am","listing_type":"RENT","hour":"2"},{"name":"BUY 4am","listing_type":"BUY","hour":"4"}]'
+SCRAPE_SCHEDULES=
+
+# WebAuthn / Passkey configuration
+WEBAUTHN_RP_ID=localhost                     # Relying Party ID (domain)
+WEBAUTHN_RP_NAME=Wrongmove                   # Relying Party display name
+WEBAUTHN_ORIGIN=https://localhost             # Expected WebAuthn origin
+
+# JWT configuration (for passkey-issued tokens)
+JWT_SECRET=change-me-in-production           # HMAC secret for HS256 signing
+JWT_ALGORITHM=HS256                          # JWT signing algorithm
+JWT_EXPIRATION_HOURS=24                      # Token expiry in hours
+JWT_ISSUER=wrongmove                         # JWT issuer claim