feat(v2): complete v2 reimplementation

contracts/repository/v1/manifest.schema.json

@@ -24,7 +24,7 @@
       "additionalProperties": false,
       "required": ["adapter", "captured_at", "evidence"],
       "properties": {
-        "adapter": {"enum": ["local", "ssh", "postgresql", "mysql"]},
+        "adapter": {"enum": ["local", "postgresql", "mysql"]},
         "captured_at": {"type": "string", "format": "date-time", "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(?:\\.[0-9]+)?Z$"},
         "evidence": {"type": "object"}
       }

contracts/repository/v1/repository.schema.json

@@ -5,6 +5,13 @@
   "type": "object",
   "additionalProperties": false,
   "required": ["repository_id", "format_version", "digest_algorithm", "compression", "encryption", "created_at"],
+  "allOf": [
+    {
+      "if": {"properties": {"encryption": {"properties": {"mode": {"const": "none"}}}}},
+      "then": {"properties": {"encryption": {"properties": {"key_id": {"type": "null"}}}}},
+      "else": {"properties": {"encryption": {"properties": {"key_id": {"type": "string", "format": "uuid", "minLength": 1}}}}}
+    }
+  ],
   "properties": {
     "repository_id": {
       "type": "string",