Fix Apple Sign In: update bundle IDs from old com.tt.honeyDue.* to com.myhoneydue.*

The iOS app was renamed (MyCrib → Casera → honeyDue) and the bundle ID
was updated to com.myhoneydue.honeyDue (release) / .dev (debug), but
APPLE_CLIENT_ID and APNS_TOPIC across env templates and k3s configs
still pointed at the old com.tt.honeyDue.honeyDueDev value. This made
verifyAudience reject every Apple identity token (aud claim mismatch).

Updated:
- deploy/prod.env.example: bundle ID + comment that empty client_id
  rejects all tokens with DEBUG=false
- .env.example: add Sign in with Apple block (was missing entirely)
- deploy-k3s{,-dev}/config.yaml.example: apple_auth.client_id default
- deploy-k3s-dev/scripts/00-init.sh: same
- docker-compose.dev.yml: APNS_TOPIC fallback
- docs/deployment/10-secrets-config.md: doc reference

The live deploy/prod.env and local .env are .gitignored — they were
edited in place and need to ship via deploy_prod.sh to take effect.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

deploy-k3s-dev/config.yaml.example

@@ -42,7 +42,7 @@ email:
 push:
   apns_key_id: ""
   apns_team_id: ""
-  apns_topic: com.tt.honeyDue
+  apns_topic: com.myhoneydue.honeyDue.dev
   apns_production: false
   apns_use_sandbox: true                # Sandbox for dev
 
@@ -85,8 +85,9 @@ tls:
   # If mode=cloudflare, create secrets/cloudflare-origin.crt and .key
 
 # --- Apple Auth / IAP (optional) ---
+# client_id MUST equal the iOS Debug bundle ID for the dev backend.
 apple_auth:
-  client_id: ""
+  client_id: "com.myhoneydue.honeyDue.dev"
   team_id: ""
   iap_key_id: ""
   iap_issuer_id: ""