schema/tls: add missing custom fields chain/cert

Task #7287

etc/schema.json

@@ -6586,9 +6586,29 @@
         "tls": {
             "type": "object",
             "properties": {
+                "certificate": {
+                    "type": "string"
+                },
+                "chain": {
+                    "type": "array",
+                    "minItems": 1,
+                    "items": {
+                        "type": "string"
+                    }
+                },
                 "client": {
                     "type": "object",
                     "properties": {
+                        "certificate": {
+                            "type": "string"
+                        },
+                        "chain": {
+                            "type": "array",
+                            "minItems": 1,
+                            "items": {
+                                "type": "string"
+                            }
+                        },
                         "fingerprint": {
                             "type": "string"
                         },