fix(db): SSL certificates table and model

- server_id is a foreign id
- server_id must be unique as each server can only have 1 CA cert
- resource_id must be unique as each resource can only have 1 SSL cert

app/Models/SslCertificate.php

@@ -11,6 +11,7 @@ class SslCertificate extends Model
         'ssl_private_key',
         'resource_type',
         'resource_id',
+        'server_id',
         'valid_until',
     ];
 
@@ -24,4 +25,9 @@ class SslCertificate extends Model
     {
         return $this->morphTo();
     }
+
+    public function server()
+    {
+        return $this->belongsTo(Server::class);
+    }
 }

database/migrations/2025_01_27_153741_create_ssl_certificates_table.php

@@ -14,10 +14,12 @@ return new class extends Migration
             $table->text('ssl_private_key');
             $table->string('resource_type')->nullable();
             $table->unsignedBigInteger('resource_id')->nullable();
-            $table->timestamp('valid_until')->nullable();
+            $table->unsignedBigInteger('server_id')->nullable();
+            $table->timestamp('valid_until');
             $table->timestamps();
 
-            $table->index(['resource_type', 'resource_id']);
+            $table->foreign('server_id')->references('id')->on('servers');
+            $table->unique(['server_id', 'resource_id']);
         });
     }