feat(extract): add OpenWeatherMap daily weather extractor

Adds extract/openweathermap package with daily weather extraction for 8
coffee-growing regions (Brazil, Vietnam, Colombia, Ethiopia, Honduras,
Guatemala, Indonesia). Feeds crop stress signal for commodity sentiment score.

Extractor:
- OWM One Call API 3.0 / Day Summary — one JSON.gz per (location, date)
- extract_weather: daily, fetches yesterday + today (16 calls max)
- extract_weather_backfill: fills 2020-01-01 to yesterday, capped at 500
  calls/run with resume cursor '{location_id}:{date}' for crash safety
- Full idempotency via file existence check; state tracking via extract_core

SQLMesh:
- seeds.weather_locations (8 regions with lat/lon/variety)
- foundation.fct_weather_daily: INCREMENTAL_BY_TIME_RANGE, grain
  (location_id, observation_date), dedup via hash key, crop stress flags:
  is_frost (<2°C), is_heat_stress (>35°C), is_drought (<1mm), in_growing_season

Landing path: LANDING_DIR/weather/{location_id}/{year}/{date}.json.gz

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

transform/sqlmesh_materia/models/serving/ice_aging_stocks.sql

@@ -1,60 +1,51 @@
--- Serving mart: ICE certified Coffee C stock aging report, analytics-ready.
---
--- Shows the age distribution of certified stocks across delivery ports.
--- Age buckets represent how long coffee has been in certified storage.
--- Older stock approaching certificate limits is a supply quality signal.
---
--- Source: ICE Certified Stock Aging Report (monthly)
--- Grain: one row per (report_date, age_bucket).
-
-MODEL (
-  name serving.ice_aging_stocks,
-  kind INCREMENTAL_BY_TIME_RANGE (
-    time_column report_date
-  ),
-  grain (report_date, age_bucket),
-  start '2020-01-01',
-  cron '@daily'
-);
-
-WITH base AS (
-  SELECT
-    f.report_date,
-    f.age_bucket,
-
-    -- Parse age range from "0000 to 0120" format for correct sort order
-    TRY_CAST(split_part(f.age_bucket, ' to ', 1) AS int) AS age_bucket_start_days,
-    TRY_CAST(split_part(f.age_bucket, ' to ', 2) AS int) AS age_bucket_end_days,
-
-    f.antwerp_bags,
-    f.hamburg_bremen_bags,
-    f.houston_bags,
-    f.miami_bags,
-    f.new_orleans_bags,
-    f.new_york_bags,
-    f.total_bags,
-
-    f.source_file
-  FROM foundation.fct_ice_aging_stocks f
-  WHERE f.report_date BETWEEN @start_ds AND @end_ds
-)
-
-SELECT
-  b.report_date,
-  d.commodity_name,
-  d.ice_stock_report_code,
-  b.age_bucket,
-  b.age_bucket_start_days,
-  b.age_bucket_end_days,
-  b.antwerp_bags,
-  b.hamburg_bremen_bags,
-  b.houston_bags,
-  b.miami_bags,
-  b.new_orleans_bags,
-  b.new_york_bags,
-  b.total_bags,
-  b.source_file
-FROM base b
-CROSS JOIN foundation.dim_commodity d
-WHERE d.ice_stock_report_code = 'COFFEE-C'
-ORDER BY b.report_date, b.age_bucket_start_days
+/* Serving mart: ICE certified Coffee C stock aging report, analytics-ready. */ /* Shows the age distribution of certified stocks across delivery ports. */ /* Age buckets represent how long coffee has been in certified storage. */ /* Older stock approaching certificate limits is a supply quality signal. */ /* Source: ICE Certified Stock Aging Report (monthly) */ /* Grain: one row per (report_date, age_bucket). */
+MODEL (
+  name serving.ice_aging_stocks,
+  kind INCREMENTAL_BY_TIME_RANGE (
+    time_column report_date
+  ),
+  grain (report_date, age_bucket),
+  start '2020-01-01',
+  cron '@daily'
+);
+
+WITH base AS (
+  SELECT
+    f.report_date,
+    f.age_bucket,
+    TRY_CAST(SPLIT_PART(f.age_bucket, ' to ', 1) AS INT) AS age_bucket_start_days, /* Parse age range from "0000 to 0120" format for correct sort order */
+    TRY_CAST(SPLIT_PART(f.age_bucket, ' to ', 2) AS INT) AS age_bucket_end_days,
+    f.antwerp_bags,
+    f.hamburg_bremen_bags,
+    f.houston_bags,
+    f.miami_bags,
+    f.new_orleans_bags,
+    f.new_york_bags,
+    f.total_bags,
+    f.source_file
+  FROM foundation.fct_ice_aging_stocks AS f
+  WHERE
+    f.report_date BETWEEN @start_ds AND @end_ds
+)
+SELECT
+  b.report_date,
+  d.commodity_name,
+  d.ice_stock_report_code,
+  b.age_bucket,
+  b.age_bucket_start_days,
+  b.age_bucket_end_days,
+  b.antwerp_bags,
+  b.hamburg_bremen_bags,
+  b.houston_bags,
+  b.miami_bags,
+  b.new_orleans_bags,
+  b.new_york_bags,
+  b.total_bags,
+  b.source_file
+FROM base AS b
+CROSS JOIN foundation.dim_commodity AS d
+WHERE
+  d.ice_stock_report_code = 'COFFEE-C'
+ORDER BY
+  b.report_date,
+  b.age_bucket_start_days