fulfillr-dev: staging back-office container + Turso store prep

Add a second go-fulfillr container (fulfillr-dev) wired to the staging
Turso store + EasyPost/Stripe test keys via dev.json, served at
fulfillr-dev.debyltech.com (Caddy -> :9055), LAN-restricted like prod.

- fulfillr-dev.yml + dev.json.j2: the staging container, volumes, config
- defaults: fulfillr_dev_* vars; prod store URL stubbed off until cutover
- Caddyfile + caddy.yml: fulfillr-dev site block and static mount
- awsddns.yml: Route53 DDNS for the fulfillr-dev hostname
- production.json.j2: add store_database_url/store_auth, rename stripe key
  var to fulfillr_stripe_api_key
- vault.yml: dev + store/stripe secrets

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

ansible/roles/podman/templates/fulfillr/dev.json.j2

@@ -0,0 +1,48 @@
+{# Staging back-office config (fulfillr-dev). Isolated dev tier:
+   - ecommerce store -> STAGING Turso (fulfillr_dev_store_*)
+   - EasyPost + Stripe -> TEST keys (fulfillr_dev_easypost_api_key / fulfillr_dev_stripe_api_key)
+   - AWS -> FulfillrAPI-Dev key (fulfillr_dev_access_key/secret_key), scoped to the -dev
+     DynamoDB tables + debyltech.reviewr.dev. Snipcart key + outreach HMAC secret are
+     reused read-only. Never touches prod data or live payment APIs. #}
+{
+  "snipcart_api_key": "{{ snipcart_api_key }}",
+  "easypost_api_key": "{{ fulfillr_dev_easypost_api_key }}",
+  "stripe_api_key": "{{ fulfillr_dev_stripe_api_key }}",
+  "backinstock_table": "debyltech-backinstock-dev",
+  "cases_table": "debyltech-cases-dev",
+  "tickets_table": "debyltech-tickets-dev",
+  "store_database_url": "{{ fulfillr_dev_store_database_url }}",
+  "store_auth_token": "{{ fulfillr_dev_store_auth_token }}",
+  "aws": {
+    "access_key": "{{ fulfillr_dev_access_key }}",
+    "secret_key": "{{ fulfillr_dev_secret_key }}",
+    "region": "{{ fulfillr_region }}",
+    "bucket": "debyltech.reviewr.dev"
+  },
+  "tax": {
+    "ein": "{{ fulfillr_tax_ein }}",
+    "ioss": null
+  },
+  "sender_address": {
+    "city": "Newbury",
+    "country": "US",
+    "email": "sales@debyltech.com",
+    "name": "de Byl Technologies LLC",
+    "phone": "6034160859",
+    "state": "NH",
+    "street1": "976 Route 103",
+    "street2": "Unit 95",
+    "zip": "03255"
+  },
+  "outreach": {
+    "outreach_table": "debyltech-outreach-dev",
+    "unsubscribe_table": "debyltech-unsubscribe-dev",
+    "email_log_table": "debyltech-email-log-dev",
+    "reviews_table": "debyltech-reviews-dev",
+    "hmac_secret_arn": "{{ fulfillr_hmac_arn }}",
+    "ses_from_email": "noreply@debyltech.com",
+    "ses_reply_to": "support@debyltech.com",
+    "ses_region": "us-east-1",
+    "base_url": "https://debyltech.com"
+  }
+}