refactor: replace fuel_scraper with newenglandoil + cheapestoil scrapers

- Add newenglandoil/ package as the primary scraper (replaces fuel_scraper)
- Add cheapestoil/ package as a secondary market price scraper
- Add app.py entry point for direct execution
- Update run.py: new scrape_cheapest(), migrate command, --state filter,
  --refresh-metadata flag for overwriting existing phone/URL data
- Update models.py with latest schema fields
- Update requirements.txt dependencies
- Update Dockerfile and docker-compose.yml for new structure
- Remove deprecated fuel_scraper module, test.py, and log file

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cheapestoil/config.py

@@ -0,0 +1,50 @@
+"""
+Configuration for the CheapestOil scraper.
+"""
+
+API_URL = "https://www.cheapestoil.com/heating-oil-prices/api"
+
+# Seconds between requests to be polite
+SCRAPE_DELAY = 2
+
+# State abbreviation -> list of county names on cheapestoil.com
+# None means state-level only (no county filter)
+STATE_COUNTIES = {
+    "MA": [
+        "Barnstable", "Berkshire", "Bristol", "Essex", "Franklin",
+        "Hampden", "Hampshire", "Middlesex", "Norfolk", "Plymouth",
+        "Suffolk", "Worcester",
+    ],
+    "CT": [
+        "Fairfield", "Hartford", "Litchfield", "Middlesex",
+        "New Haven", "New London", "Tolland", "Windham",
+    ],
+    "ME": [
+        "Cumberland", "York", "Penobscot", "Kennebec", "Androscoggin",
+        "Aroostook", "Oxford", "Hancock", "Somerset", "Knox",
+        "Waldo", "Sagadahoc", "Lincoln", "Washington", "Franklin",
+        "Piscataquis",
+    ],
+    "NH": [
+        "Belknap", "Carroll", "Cheshire", "Coos", "Grafton",
+        "Hillsborough", "Merrimack", "Rockingham", "Strafford", "Sullivan",
+    ],
+    "RI": [
+        "Bristol", "Kent", "Newport", "Providence", "Washington",
+    ],
+    "VT": [
+        "Addison", "Bennington", "Caledonia", "Chittenden", "Essex",
+        "Franklin", "Grand Isle", "Lamoille", "Orange", "Orleans",
+        "Rutland", "Washington", "Windham", "Windsor",
+    ],
+}
+
+# State abbreviation -> API state name (as used in cheapestoil.com params)
+STATE_API_NAMES = {
+    "MA": "Massachusetts",
+    "CT": "Connecticut",
+    "ME": "Maine",
+    "NH": "NewHampshire",
+    "RI": "RhodeIsland",
+    "VT": "Vermont",
+}