feat: add stack reset helper and setup runbook

DEPLOYMENT.md

@@ -217,6 +217,43 @@ HEALTH_URL=http://192.168.2.55:8088/healthz/ \
 ./scripts/deploy_test_from_mac.sh
 ```
 
+## Reset a stack from scratch
+Use this only when you intentionally want a fresh environment with default bootstrap data.
+
+What it does:
+1. syncs the current checkout to the target server
+2. stops the stack
+3. removes compose volumes with `down -v`
+4. rebuilds and bootstraps the stack again
+5. verifies the health endpoint
+
+Local test server reset:
+```bash
+git checkout develop
+RESET_CONFIRM=RESET EXPECTED_BRANCH=develop ./scripts/reset_stack_from_mac.sh
+```
+
+Customer/TUBCO reset example:
+```bash
+git checkout release/tubco-v1
+RESET_CONFIRM=RESET \
+EXPECTED_BRANCH=release/tubco-v1 \
+DEPLOY_HOST=root@<customer-host> \
+DEPLOY_PATH=/opt/workdock \
+REMOTE_ENV_FILE=.env.prod \
+HEALTH_URL=https://portal.tub.co/healthz/ \
+RUN_DJANGO_CHECK=1 \
+./scripts/reset_stack_from_mac.sh
+```
+
+This is destructive. It wipes:
+- database state
+- generated documents/media
+- staticfiles volume
+- backup volume
+
+It does not remove the server-local env file. That file must already exist.
+
 ## Manual production deployment
 For production, use a dedicated helper instead of the test script.