refactor: rename materia → beanflows throughout codebase

- Rename src/materia/ → src/beanflows/ (Python package)
- Rename transform/sqlmesh_materia/ → transform/sqlmesh_beanflows/
- Rename infra/supervisor/materia-supervisor.service → beanflows-supervisor.service
- Rename infra/backup/materia-backup.{service,timer} → beanflows-backup.{service,timer}
- Update all path strings: /opt/materia → /opt/beanflows, /data/materia → /data/beanflows
- Update pyproject.toml: project name, CLI entrypoint, workspace source key
- Update all internal imports from materia.* → beanflows.*
- Update infra scripts: REPO_DIR, service names, systemctl references
- Fix docker-compose.prod.yml: /data/materia → /data/beanflows (bind mount path)

Intentionally left unchanged: Pulumi stack name (materia-infrastructure) and
Hetzner resource names ("materia-key", "managed_by: materia") — these reference
live cloud infrastructure and require separate cloud-side renames.

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

transform/sqlmesh_beanflows/models/cleaned/cln_psdalldata__commodity_pivoted.sql

@@ -0,0 +1,59 @@
+MODEL (
+  name cleaned.psdalldata__commodity_pivoted,
+  kind INCREMENTAL_BY_TIME_RANGE (
+    time_column ingest_date
+  ),
+  start '2006-08-01',
+  cron '@daily'
+);
+
+SELECT
+  MAX(hkey) AS hkey,
+  commodity_code,
+  MAX(commodity_name) AS commodity_name,
+  country_code,
+  MAX(country_name) AS country_name,
+  market_year,
+  ingest_date,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Production' THEN value END), 0) AS Production,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Imports' THEN value END), 0) AS Imports,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Exports' THEN value END), 0) AS Exports,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Total Distribution' THEN value END), 0) AS Total_Distribution,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Ending Stocks' THEN value END), 0) AS Ending_Stocks,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Beginning Stocks' THEN value END), 0) AS Beginning_Stocks,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Total Supply' THEN value END), 0) AS Total_Supply,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Domestic Consumption' THEN value END), 0) AS Domestic_Consumption,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Domestic Demand' THEN value END), 0) AS Domestic_Demand,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Food Use' THEN value END), 0) AS Food_Use,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Industrial Use' THEN value END), 0) AS Industrial_Use,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Seed Use' THEN value END), 0) AS Seed_Use,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Waste' THEN value END), 0) AS Waste,
+  COALESCE(SUM(CASE WHEN attribute_name = 'Feed Use' THEN value END), 0) AS Feed_Use
+FROM staging.psdalldata__commodity
+WHERE
+  attribute_name IN (
+    'Production',
+    'Imports',
+    'Exports',
+    'Total Distribution',
+    'Ending Stocks',
+    'Beginning Stocks',
+    'Total Supply',
+    'Domestic Consumption',
+    'Domestic Demand',
+    'Food Use',
+    'Industrial Use',
+    'Seed Use',
+    'Waste',
+    'Feed Use'
+  )
+GROUP BY
+  commodity_code,
+  country_code,
+  market_year,
+  ingest_date
+ORDER BY
+  commodity_code,
+  country_code,
+  market_year,
+  ingest_date