fix(extract,transform): fix COT/prices column name mismatches + OWM rate limit skip

- fct_cot_positioning: quote Swap__Positions_Short_All and Swap__Positions_Spread_All
  (CSV uses double underscore; DuckDB preserves header names exactly)
- fct_cot_positioning: quote Report_Date_as_YYYY-MM-DD (dashes preserved in header)
- fct_coffee_prices: quote "Adj Close" (space in CSV header)
- openmeteo/execute.py: skip API call in backfill when all daily files already exist
  (_count_existing_files pre-check prevents 429 rate limit on re-runs)
- dev_run.sh: open browser as admin@beanflows.coffee instead of pro@

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

transform/sqlmesh_materia/models/foundation/fct_coffee_prices.sql

@@ -29,7 +29,7 @@ WITH src AS (
     TRY_CAST(High AS DOUBLE) AS high,
     TRY_CAST(Low AS DOUBLE) AS low,
     TRY_CAST(Close AS DOUBLE) AS close,
-    TRY_CAST(Adj_Close AS DOUBLE) AS adj_close,
+    TRY_CAST("Adj Close" AS DOUBLE) AS adj_close,
     TRY_CAST(Volume AS BIGINT) AS volume,
     filename AS source_file, /* Filename encodes the content hash — use as ingest identifier */
     HASH(Date, Close) AS hkey /* Dedup key: trade date + close price */