feat(self_healing): add LEP-6 chain-driven heal-op dispatch runtime

Makefile

@@ -152,7 +152,7 @@ gen-supernode:
 		--grpc-gateway_out=gen \
 		--grpc-gateway_opt=paths=source_relative \
 		--openapiv2_out=gen \
-		proto/supernode/service.proto proto/supernode/status.proto proto/supernode/storage_challenge.proto
+		proto/supernode/service.proto proto/supernode/status.proto proto/supernode/storage_challenge.proto proto/supernode/self_healing.proto
 
 # Define the paths
 SUPERNODE_SRC=supernode/main.go

gen/supernode/self_healing.swagger.json

@@ -0,0 +1,68 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "supernode/self_healing.proto",
+    "version": "version not set"
+  },
+  "tags": [
+    {
+      "name": "SelfHealingService"
+    }
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "produces": [
+    "application/json"
+  ],
+  "paths": {},
+  "definitions": {
+    "protobufAny": {
+      "type": "object",
+      "properties": {
+        "@type": {
+          "type": "string"
+        }
+      },
+      "additionalProperties": {}
+    },
+    "rpcStatus": {
+      "type": "object",
+      "properties": {
+        "code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "message": {
+          "type": "string"
+        },
+        "details": {
+          "type": "array",
+          "items": {
+            "type": "object",
+            "$ref": "#/definitions/protobufAny"
+          }
+        }
+      }
+    },
+    "supernodeServeReconstructedArtefactsResponse": {
+      "type": "object",
+      "properties": {
+        "chunk": {
+          "type": "string",
+          "format": "byte",
+          "description": "chunk is a contiguous slice of the reconstructed file bytes. Chunks are\nordered; concatenating chunks across the stream yields the original file\nwhose BLAKE3 must equal op.ResultHash (= action.DataHash recipe)."
+        },
+        "totalSize": {
+          "type": "string",
+          "format": "uint64",
+          "description": "total_size is the full file size; populated on the first message and\noptionally repeated. Allows clients to pre-allocate buffers."
+        },
+        "isLast": {
+          "type": "boolean",
+          "description": "is_last indicates this message carries the final chunk."
+        }
+      }
+    }
+  }
+}