chore: move serde helpers to common utils

Relocate SurrealDB serde helpers out of storage types so they can be
reused broadly, and align retrieval-pipeline test setup with configured
embedding dimensions.

common/src/storage/types/analytics.rs

@@ -1,4 +1,5 @@
-use crate::storage::types::{serde_helpers::deserialize_flexible_id, user::User, StoredObject};
+use crate::storage::types::{user::User, StoredObject};
+use crate::utils::serde_helpers::deserialize_flexible_id;
 use serde::{Deserialize, Serialize};
 
 use crate::{error::AppError, storage::db::SurrealDbClient};

common/src/storage/types/knowledge_relationship.rs

@@ -1,4 +1,4 @@
-use crate::storage::types::serde_helpers::deserialize_flexible_id;
+use crate::utils::serde_helpers::deserialize_flexible_id;
 use crate::storage::types::user::User;
 use crate::{error::AppError, storage::db::SurrealDbClient};
 use serde::{Deserialize, Serialize};

common/src/storage/types/mod.rs

@@ -10,7 +10,6 @@ pub mod knowledge_entity_embedding;
 pub mod knowledge_relationship;
 pub mod message;
 pub mod scratchpad;
-pub mod serde_helpers;
 pub mod system_prompts;
 pub mod system_settings;
 pub mod text_chunk;
@@ -29,7 +28,7 @@ macro_rules! stored_object {
         use serde::{Deserialize, Serialize};
         use $crate::storage::types::StoredObject;
         #[allow(unused_imports)]
-        use $crate::storage::types::serde_helpers::{
+        use $crate::utils::serde_helpers::{
             deserialize_flexible_id, serialize_datetime, deserialize_datetime,
             serialize_option_datetime, deserialize_option_datetime,
         };

common/src/storage/types/system_settings.rs

@@ -1,4 +1,4 @@
-use crate::storage::types::serde_helpers::deserialize_flexible_id;
+use crate::utils::serde_helpers::deserialize_flexible_id;
 use serde::{Deserialize, Serialize};
 
 use crate::{error::AppError, storage::db::SurrealDbClient, storage::types::StoredObject};

common/src/utils/mod.rs

@@ -1,4 +1,5 @@
 pub mod config;
 pub mod embedding;
 pub mod ingest_limits;
+pub mod serde_helpers;
 pub mod template_engine;