Add per database configs (#14173)

Author: Enjection

src/api/protos/draft/ydb_dynamic_config.proto

@@ -9,8 +9,12 @@ import "src/api/protos/ydb_operation.proto";
 message ConfigIdentity {
     // Current main config version
     uint64 version = 1;
-    // Cluster name (should be set on node with console tablet, unknown by default)
-    string cluster = 2;
+    oneof type {
+        // Cluster name (should be set on node with console tablet, unknown by default)
+        string cluster = 2;
+        // database name
+        string database = 3;
+    }
 }
 
 message SetConfigRequest {
@@ -19,6 +23,7 @@ message SetConfigRequest {
     string config = 2;
     bool dry_run = 3;
     bool allow_unknown_fields = 4;
+    bool allow_absent_database = 5;
 }
 
 message SetConfigResponse {
@@ -31,6 +36,7 @@ message ReplaceConfigRequest {
     string config = 2;
     bool dry_run = 3;
     bool allow_unknown_fields = 4;
+    bool allow_absent_database = 5;
 }
 
 message ReplaceConfigResponse {
@@ -74,12 +80,12 @@ message GetConfigResponse {
 }
 
 message GetConfigResult {
-    // Main dynamic config with metadata in YAML format
-    string config = 1;
+    // Main/database dynamic config with metadata in YAML format
+    repeated string config = 1;
     // All volatile configs
     repeated VolatileConfig volatile_configs = 2;
 
-    ConfigIdentity identity = 3;
+    repeated ConfigIdentity identity = 3;
 }
 
 message VolatileConfigMetadata {

src/client/draft/ydb_dynamic_config.cpp

@@ -156,9 +156,9 @@ class TDynamicConfigClient::TImpl : public TClientImplCommon<TDynamicConfigClien
                 std::string config;
                 std::map<uint64_t, std::string> volatileConfigs;
                 if (Ydb::DynamicConfig::GetConfigResult result; any && any->UnpackTo(&result)) {
-                    clusterName = result.identity().cluster();
-                    version = result.identity().version();
-                    config = result.config();
+                    clusterName = result.identity(0).cluster();
+                    version = result.identity(0).version();
+                    config = result.config(0);
                     for (const auto& config : result.volatile_configs()) {
                         volatileConfigs.emplace(config.id(), config.config());
                     }