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/bootstrap_supervisor.sh

@@ -14,7 +14,7 @@
 set -euo pipefail
 
 SERVICE_USER="beanflows_service"
-REPO_DIR="/opt/materia"
+REPO_DIR="/opt/beanflows"
 GITEA_REPO="ssh://git@git.padelnomics.io:2222/deemanone/beanflows.git"
 UV="/home/${SERVICE_USER}/.local/bin/uv"
 
@@ -57,9 +57,9 @@ sudo -u "${SERVICE_USER}" bash -c "cd ${REPO_DIR} && ${UV} sync --all-packages"
 
 # ── Systemd supervisor service ────────────────────────────────────────────────
 
-cp "${REPO_DIR}/infra/supervisor/materia-supervisor.service" /etc/systemd/system/
+cp "${REPO_DIR}/infra/supervisor/beanflows-supervisor.service" /etc/systemd/system/
 systemctl daemon-reload
-systemctl enable --now materia-supervisor
+systemctl enable --now beanflows-supervisor
 
 # ── R2 backup timer (optional) ────────────────────────────────────────────────
 # Enabled only when R2_ACCESS_KEY_ID, R2_SECRET_ACCESS_KEY, and R2_ENDPOINT
@@ -96,7 +96,7 @@ EOF
     chmod 600 "${RCLONE_CONF}"
 
     UNITS_CHANGED=0
-    for unit in materia-backup.service materia-backup.timer; do
+    for unit in beanflows-backup.service beanflows-backup.timer; do
         if ! diff -q "${REPO_DIR}/infra/backup/${unit}" "/etc/systemd/system/${unit}" >/dev/null 2>&1; then
             cp "${REPO_DIR}/infra/backup/${unit}" /etc/systemd/system/
             UNITS_CHANGED=1
@@ -104,7 +104,7 @@ EOF
     done
     [ "${UNITS_CHANGED}" = "1" ] && systemctl daemon-reload
 
-    systemctl enable --now materia-backup.timer
+    systemctl enable --now beanflows-backup.timer
     echo "$(date '+%H:%M:%S') ==> R2 backup timer enabled."
 else
     echo "$(date '+%H:%M:%S') ==> R2_ACCESS_KEY_ID / R2_SECRET_ACCESS_KEY / R2_ENDPOINT not set — skipping backup timer."
@@ -113,8 +113,8 @@ fi
 echo ""
 echo "=== Bootstrap complete! ==="
 echo ""
-echo "Check status:    systemctl status materia-supervisor"
-echo "View logs:       journalctl -u materia-supervisor -f"
-echo "Workflow status: sudo -u ${SERVICE_USER} ${UV} run -p ${REPO_DIR} python src/materia/supervisor.py status"
-echo "Backup timer:    systemctl list-timers materia-backup.timer"
+echo "Check status:    systemctl status beanflows-supervisor"
+echo "View logs:       journalctl -u beanflows-supervisor -f"
+echo "Workflow status: sudo -u ${SERVICE_USER} ${UV} run -p ${REPO_DIR} python src/beanflows/supervisor.py status"
+echo "Backup timer:    systemctl list-timers beanflows-backup.timer"
 echo "Tag:             $(sudo -u "${SERVICE_USER}" git -C "${REPO_DIR}" describe --tags --always)"