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/prod.env.example

@@ -35,7 +35,7 @@ DEFAULT_FROM_EMAIL=honeyDue <noreply@honeyDue.treytartt.com>
 # APNS private key goes in deploy/secrets/apns_auth_key.p8
 APNS_AUTH_KEY_ID=CHANGEME_APNS_KEY_ID
 APNS_TEAM_ID=CHANGEME_APNS_TEAM_ID
-APNS_TOPIC=com.tt.honeyDue
+APNS_TOPIC=com.myhoneydue.honeyDue
 APNS_USE_SANDBOX=false
 APNS_PRODUCTION=true
 
@@ -80,7 +80,11 @@ FEATURE_PDF_REPORTS_ENABLED=true
 FEATURE_WORKER_ENABLED=true
 
 # Optional auth/iap values
-APPLE_CLIENT_ID=
+# APPLE_CLIENT_ID must equal the iOS Release bundle ID. The Apple
+# identity-token `aud` claim is verified against this value
+# (internal/services/apple_auth.go::verifyAudience). Leaving it empty
+# with DEBUG=false rejects every Apple token as invalid audience.
+APPLE_CLIENT_ID=com.myhoneydue.honeyDue
 APPLE_TEAM_ID=
 GOOGLE_CLIENT_ID=
 GOOGLE_ANDROID_CLIENT_ID=