PR(TEST): WIP- Test Adding Permissioned Schema

tests/integration/acp/README.md

@@ -4,3 +4,12 @@
 1) `./add_policy`
     - This directory tests ONLY the `Adding of a Policy` through DefraDB.
     - Does NOT test DPI validation.
+
+2) `./add_dpi_schema`
+    - This directory tests the loading/adding of a schema that has `@policy(id, resource)`
+      specified (i.e. permissioned schema). The tests ensure that only a schema linking to
+      a valid DPI policy is accepted. Naturally these tests will also be `Adding a Policy`
+      through DefraDB like in (1) before actually adding the schema. If a schema has a
+      policy specified that doesn't exist (or wasn't added yet), that schema WILL/MUST
+      be rejected in these tests.
+    - Tests DPI validation.