Query complexity validation (#16274)

Validations : 
- relations count (in common api)
- oneToMany relation nested count (in common)
- requested fields count (in gql)
- root resolver count (in gql)
- root resolver duplicates (in gql)
- specific complexity for metadata / nesting count (in gql)

packages/twenty-server/src/engine/core-modules/twenty-config/config-variables.ts

@@ -989,10 +989,26 @@ export class ConfigVariables {
   @CastToPositiveNumber()
   @ConfigVariablesMetadata({
     group: ConfigVariablesGroup.RATE_LIMITING,
-    description: 'Maximum complexity allowed for GQL queries',
+    description: 'Maximum fields allowed for GQL queries',
     type: ConfigVariableType.NUMBER,
   })
-  GRAPHQL_MAX_COMPLEXITY = 2000;
+  GRAPHQL_MAX_FIELDS = 2000;
+
+  @CastToPositiveNumber()
+  @ConfigVariablesMetadata({
+    group: ConfigVariablesGroup.RATE_LIMITING,
+    description: 'Maximum root resolvers allowed for GQL queries',
+    type: ConfigVariableType.NUMBER,
+  })
+  GRAPHQL_MAX_ROOT_RESOLVERS = 20;
+
+  @CastToPositiveNumber()
+  @ConfigVariablesMetadata({
+    group: ConfigVariablesGroup.RATE_LIMITING,
+    description: 'Maximum complexity allowed for Common API queries',
+    type: ConfigVariableType.NUMBER,
+  })
+  COMMON_QUERY_COMPLEXITY_LIMIT = 50;
 
   @ConfigVariablesMetadata({
     group: ConfigVariablesGroup.RATE_LIMITING,