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/serving/ice_warehouse_stocks.sql

@@ -0,0 +1,53 @@
+/* Serving mart: ICE certified Coffee C warehouse stocks, analytics-ready. */ /* Adds 30-day rolling average, week-over-week change, and drawdown from */ /* 52-week high. Physical supply indicator used alongside S/D and positioning. */ /* "Certified stocks" = coffee graded and stamped as eligible for delivery */ /* against ICE Coffee C futures — traders watch this as a squeeze indicator. */ /* Grain: one row per report_date. */
+MODEL (
+  name serving.ice_warehouse_stocks,
+  kind INCREMENTAL_BY_TIME_RANGE (
+    time_column report_date
+  ),
+  grain (
+    report_date
+  ),
+  start '2000-01-01',
+  cron '@daily'
+);
+
+WITH base AS (
+  SELECT
+    f.report_date,
+    f.total_certified_bags,
+    f.pending_grading_bags,
+    f.total_certified_bags /* Week-over-week change (compare to 7 calendar days ago via LAG over ordered rows) */ /* Using LAG(1) since data is daily: compares to previous trading/reporting day */ - LAG(f.total_certified_bags, 1) OVER (ORDER BY f.report_date) AS wow_change_bags,
+    ROUND(
+      AVG(f.total_certified_bags::DOUBLE) OVER (ORDER BY f.report_date ROWS BETWEEN 29 PRECEDING AND CURRENT ROW),
+      0
+    ) AS avg_30d_bags, /* 30-day rolling average (smooths daily noise) */
+    MAX(f.total_certified_bags) OVER (ORDER BY f.report_date ROWS BETWEEN 364 PRECEDING AND CURRENT ROW) AS high_52w_bags, /* 52-week high (365 calendar days ≈ 252 trading days; use 365-row window as proxy) */
+    ROUND(
+      (
+        f.total_certified_bags::DOUBLE - MAX(f.total_certified_bags) OVER (ORDER BY f.report_date ROWS BETWEEN 364 PRECEDING AND CURRENT ROW)::DOUBLE
+      ) / NULLIF(
+        MAX(f.total_certified_bags) OVER (ORDER BY f.report_date ROWS BETWEEN 364 PRECEDING AND CURRENT ROW)::DOUBLE,
+        0
+      ) * 100,
+      2
+    ) AS drawdown_from_52w_high_pct /* Drawdown from 52-week high (pct below peak — squeeze indicator) */
+  FROM foundation.fct_ice_warehouse_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.total_certified_bags,
+  b.pending_grading_bags,
+  b.wow_change_bags,
+  b.avg_30d_bags,
+  b.high_52w_bags,
+  b.drawdown_from_52w_high_pct
+FROM base AS b
+CROSS JOIN foundation.dim_commodity AS d
+WHERE
+  d.ice_stock_report_code = 'COFFEE-C'
+ORDER BY
+  b.report_date