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>

infra/supervisor/beanflows-supervisor.service

@@ -0,0 +1,29 @@
+[Unit]
+Description=Beanflows Supervisor - Pipeline Orchestration
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=beanflows_service
+WorkingDirectory=/opt/beanflows
+ExecStart=/bin/sh -c 'exec uv run python src/beanflows/supervisor.py'
+Restart=always
+RestartSec=10
+EnvironmentFile=/opt/beanflows/.env
+Environment=PATH=/home/beanflows_service/.local/bin:/usr/local/bin:/usr/bin:/bin
+Environment=LANDING_DIR=/data/beanflows/landing
+Environment=DUCKDB_PATH=/data/beanflows/lakehouse.duckdb
+Environment=SERVING_DUCKDB_PATH=/data/beanflows/analytics.duckdb
+Environment=SUPERVISOR_GIT_PULL=1
+
+# Resource limits
+LimitNOFILE=65536
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=beanflows-supervisor
+
+[Install]
+WantedBy=multi-user.target

infra/supervisor/materia-supervisor.service

@@ -1,29 +0,0 @@
-[Unit]
-Description=Materia Supervisor - Pipeline Orchestration
-After=network-online.target
-Wants=network-online.target
-
-[Service]
-Type=simple
-User=beanflows_service
-WorkingDirectory=/opt/materia
-ExecStart=/bin/sh -c 'exec uv run python src/materia/supervisor.py'
-Restart=always
-RestartSec=10
-EnvironmentFile=/opt/materia/.env
-Environment=PATH=/home/beanflows_service/.local/bin:/usr/local/bin:/usr/bin:/bin
-Environment=LANDING_DIR=/data/materia/landing
-Environment=DUCKDB_PATH=/data/materia/lakehouse.duckdb
-Environment=SERVING_DUCKDB_PATH=/data/materia/analytics.duckdb
-Environment=SUPERVISOR_GIT_PULL=1
-
-# Resource limits
-LimitNOFILE=65536
-
-# Logging
-StandardOutput=journal
-StandardError=journal
-SyslogIdentifier=materia-supervisor
-
-[Install]
-WantedBy=multi-user.target