fix some foreign id fields and max-length

application/Espo/Resources/metadata/entityAcl/Attachment.json

@@ -3,6 +3,9 @@
         "storage": {
             "readOnly": true
         },
+        "source": {
+            "readOnly": true
+        },
         "sourceId": {
             "readOnly": true
         }

application/Espo/Resources/metadata/entityDefs/ActionHistoryRecord.json

@@ -36,7 +36,7 @@
         },
         "ipAddress": {
             "type": "varchar",
-            "maxLength": "39"
+            "maxLength": 39
         },
         "authToken": {
             "type": "link"

application/Espo/Resources/metadata/entityDefs/Attachment.json

@@ -25,12 +25,10 @@
             "view": "views/attachment/fields/parent",
             "validatorClassName": "Espo\\Classes\\FieldValidators\\Attachment\\Related"
         },
-        "sourceId": {
-            "type": "varchar",
-            "maxLength": 36,
+        "source": {
+            "type": "link",
             "readOnly": true,
-            "disabled": true,
-            "index": true
+            "disabled": true
         },
         "field": {
             "type": "varchar",

application/Espo/Resources/metadata/entityDefs/AuthLogRecord.json

@@ -19,7 +19,7 @@
         },
         "ipAddress": {
             "type": "varchar",
-            "maxLength": "45",
+            "maxLength": 45,
             "readOnly": true
         },
         "createdAt": {
@@ -55,7 +55,7 @@
         "requestMethod": {
             "type": "varchar",
             "readOnly": true,
-            "maxLength": "15"
+            "maxLength": 15
         },
         "authTokenIsActive": {
             "type": "foreign",

application/Espo/Resources/metadata/entityDefs/AuthToken.json

@@ -2,7 +2,7 @@
     "fields": {
         "token": {
             "type": "varchar",
-            "maxLength": "36",
+            "maxLength": 36,
             "index": true,
             "readOnly": true
         },
@@ -14,12 +14,7 @@
         },
         "secret": {
             "type": "varchar",
-            "maxLength": "36",
-            "readOnly": true
-        },
-        "userId": {
-            "type": "varchar",
-            "maxLength": "36",
+            "maxLength": 36,
             "readOnly": true
         },
         "user": {
@@ -32,7 +27,7 @@
         },
         "ipAddress": {
             "type": "varchar",
-            "maxLength": "45",
+            "maxLength": 45,
             "readOnly": true
         },
         "isActive": {