feat: introduce reconcile interface (#264)

* feat: introduce reconcile interface

* chore: gen set_header

* chore: add comments

* feat: return procedure_id

* feat: add `ResolveStragey` and `Parallelism` to request

* chore: apply suggestions from CR

proto/greptime/v1/meta/procedure.proto

@@ -52,6 +52,46 @@ message ProcedureDetailResponse {
   repeated ProcedureMeta procedures = 2;
 }
 
+enum ResolveStrategy {
+  UseLatest = 0;
+  UseMetasrv = 1;
+  AbortOnConflict = 2;
+}
+
+message ReconcileTable {
+  string catalog_name = 1;
+  string schema_name = 2;
+  string table_name = 3;
+  ResolveStrategy resolve_strategy = 4;
+}
+
+message ReconcileDatabase {
+  string catalog_name = 1;
+  string database_name = 2;
+  uint32 parallelism = 3;
+  ResolveStrategy resolve_strategy = 4;
+}
+
+message ReconcileCatalog {
+  string catalog_name = 1;
+  uint32 parallelism = 2;
+  ResolveStrategy resolve_strategy = 3;
+}
+
+message ReconcileRequest {
+  RequestHeader header = 1;
+  oneof target {
+    ReconcileTable reconcile_table = 2;
+    ReconcileDatabase reconcile_database = 3;
+    ReconcileCatalog reconcile_catalog = 4;
+  }
+}
+
+message ReconcileResponse {
+  ResponseHeader header = 1;
+  ProcedureId pid = 2;
+}
+
 service ProcedureService {
   // Query a submitted procedure state
   rpc query(QueryProcedureRequest) returns (ProcedureStateResponse);
@@ -59,6 +99,9 @@ service ProcedureService {
   // Submits a DDL task
   rpc ddl(DdlTaskRequest) returns (DdlTaskResponse);
 
+  // Submits a reconcile task
+  rpc reconcile(ReconcileRequest) returns (ReconcileResponse);
+
   // Submits a region migration task
   rpc migrate(MigrateRegionRequest) returns (MigrateRegionResponse);