feat: Add WhatsApp health monitoring and self-service registration completion (#12556)

Fixes
https://linear.app/chatwoot/issue/CW-5692/whatsapp-es-numbers-stuck-in-pending-due-to-premature-registration


###  Problem  
Multiple customers reported that their WhatsApp numbers remain stuck in
**Pending** in WhatsApp Manager even after successful onboarding.

- Our system triggers a **registration call**
(`/<PHONE_NUMBER_ID>/register`) as soon as the number is OTP verified.
- In many cases, Meta hasn’t finished **display name
review/provisioning**, so the call fails with:

  ```
  code: 100, error_subcode: 2388001
  error_user_title: "Cannot Create Certificate"
error_user_msg: "Your display name could not be processed. Please edit
your display name and try again."
  ```

- This leaves the number stuck in Pending, no messaging can start until
we manually retry registration.
- Some customers have reported being stuck in this state for **7+
days**.

###  Root cause  
- We only check `code_verification_status = VERIFIED` before attempting
registration.
- We **don’t wait** for display name provisioning (`name_status` /
`platform_type`) to be complete.
- As a result, registration fails prematurely and the number never
transitions out of Pending.

### Solution  

#### 1. Health Status Monitoring  
- Build a backend service to fetch **real-time health data** from Graph
API:
  - `code_verification_status`  
  - `name_status` / `display_name_status`  
  - `platform_type`  
  - `throughput.level`  
  - `messaging_limit_tier`  
  - `quality_rating`  
- Expose health data via API
(`/api/v1/accounts/:account_id/inboxes/:id/health`).
- Display this in the UI as an **Account Health tab** with clear badges
and direct links to WhatsApp Manager.

#### 2. Smarter Registration Logic  
- Update `WebhookSetupService` to include a **dual-condition check**:  
  - Register if:  
    1. Phone is **not verified**, OR  
2. Phone is **verified but provisioning incomplete** (`platform_type =
NOT_APPLICABLE`, `throughput.level = NOT_APPLICABLE`).
- Skip registration if number is already provisioned.  
- Retry registration automatically when stuck.  
- Provide a UI banner with complete registration button so customers can
retry without manual support.

### Screenshot
<img width="2292" height="1344" alt="CleanShot 2025-09-30 at 16 01
03@2x"
src="https://github.com/user-attachments/assets/1c417d2a-b11c-475e-b092-3c5671ee59a7"
/>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/i18n/locale/en/inboxMgmt.json

@@ -5,6 +5,8 @@
     "LEARN_MORE": "Learn more about inboxes",
     "RECONNECTION_REQUIRED": "Your inbox is disconnected. You won't receive new messages until you reauthorize it.",
     "CLICK_TO_RECONNECT": "Click here to reconnect.",
+    "WHATSAPP_REGISTRATION_INCOMPLETE": "Your WhatsApp Business registration isn’t complete. Please check your display name status in Meta Business Manager before reconnecting.",
+    "COMPLETE_REGISTRATION": "Complete Registration",
     "LIST": {
       "404": "There are no inboxes attached to this account."
     },
@@ -605,8 +607,62 @@
       "BUSINESS_HOURS": "Business Hours",
       "WIDGET_BUILDER": "Widget Builder",
       "BOT_CONFIGURATION": "Bot Configuration",
+      "ACCOUNT_HEALTH": "Account Health",
       "CSAT": "CSAT"
     },
+    "ACCOUNT_HEALTH": {
+      "TITLE": "Manage your WhatsApp account",
+      "DESCRIPTION": "Review your WhatsApp account status, messaging limits, and quality. Update settings or resolve issues if needed",
+      "GO_TO_SETTINGS": "Go to Meta Business Manager",
+      "NO_DATA": "Health data is not available",
+      "FIELDS": {
+        "DISPLAY_PHONE_NUMBER": {
+          "LABEL": "Display phone number",
+          "TOOLTIP": "Phone number displayed to customers"
+        },
+        "VERIFIED_NAME": {
+          "LABEL": "Business name",
+          "TOOLTIP": "Business name verified by WhatsApp"
+        },
+        "DISPLAY_NAME_STATUS": {
+          "LABEL": "Display name status",
+          "TOOLTIP": "Status of your business name verification"
+        },
+        "QUALITY_RATING": {
+          "LABEL": "Quality rating",
+          "TOOLTIP": "WhatsApp quality rating for your account"
+        },
+        "MESSAGING_LIMIT_TIER": {
+          "LABEL": "Messaging limit tier",
+          "TOOLTIP": "Daily messaging limit for your account"
+        },
+        "ACCOUNT_MODE": {
+          "LABEL": "Account mode",
+          "TOOLTIP": "Current operating mode of your WhatsApp account"
+        }
+      },
+      "VALUES": {
+        "TIERS": {
+          "TIER_250": "250 customers per 24h",
+          "TIER_1000": "1K customers per 24h",
+          "TIER_1K": "1K customers per 24h",
+          "TIER_10K": "10K customers per 24h",
+          "TIER_100K": "100K customers per 24h",
+          "TIER_UNLIMITED": "Unlimited customers per 24h"
+        },
+        "STATUSES": {
+          "APPROVED": "Approved",
+          "PENDING_REVIEW": "Pending Review",
+          "AVAILABLE_WITHOUT_REVIEW": "Available Without Review",
+          "REJECTED": "Rejected",
+          "DECLINED": "Declined"
+        },
+        "MODES": {
+          "SANDBOX": "Sandbox",
+          "LIVE": "Live"
+        }
+      }
+    },
     "SETTINGS": "Settings",
     "FEATURES": {
       "LABEL": "Features",