Add per-customer SMS and Bird Integrations for patient messaging.

Patient SMS/email now use encrypted tenant keys via the platform relay instead of shared platform Care API keys.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_07_12_100000_create_care_messaging_credentials_table.php

@@ -0,0 +1,38 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('care_messaging_credentials', function (Blueprint $table) {
+            $table->id();
+            $table->string('owner_ref')->index();
+            $table->foreignId('organization_id')->constrained('care_organizations')->cascadeOnDelete();
+            $table->text('sms_api_key_encrypted')->nullable();
+            $table->string('sms_api_key_prefix', 32)->nullable();
+            $table->string('sms_sender_id', 11)->nullable();
+            $table->string('sms_status', 32)->nullable();
+            $table->timestamp('sms_validated_at')->nullable();
+            $table->text('sms_last_error')->nullable();
+            $table->text('bird_api_key_encrypted')->nullable();
+            $table->string('bird_api_key_prefix', 32)->nullable();
+            $table->string('bird_from_email')->nullable();
+            $table->string('bird_from_name')->nullable();
+            $table->string('bird_status', 32)->nullable();
+            $table->timestamp('bird_validated_at')->nullable();
+            $table->text('bird_last_error')->nullable();
+            $table->timestamps();
+
+            $table->unique('organization_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('care_messaging_credentials');
+    }
+};