test(config): add migration tests for litellm provider

* Implement tests for migrating configuration from v1 to v2 for the litellm provider.
* Validate the structure and values of the migrated configuration.
* Ensure migration rejects newer versions of the configuration.
fix(validate): enhance AI provider validation logic
* Consolidate provider validation into a dedicated method.
* Ensure at least one provider is specified and validate its type.
* Check for required fields based on provider type.
fix(mcpserver): update tool set to use new enrichment tool
* Replace RetryMetadataTool with RetryEnrichmentTool in the ToolSet.
fix(tools): refactor tools to use embedding and metadata runners
* Update tools to utilize EmbeddingRunner and MetadataRunner instead of Provider.
* Adjust method calls to align with the new runner interfaces.

internal/tools/retrieval.go

@@ -11,12 +11,14 @@ import (
 	thoughttypes "git.warky.dev/wdevs/amcs/internal/types"
 )
 
-// semanticSearch runs vector similarity search if embeddings exist for the active model
-// in the given scope, otherwise falls back to Postgres full-text search.
+// semanticSearch runs vector similarity search if embeddings exist for the
+// primary embedding model in the given scope, otherwise falls back to Postgres
+// full-text search. Search always uses the primary model so query vectors
+// match rows stored under the primary model name.
 func semanticSearch(
 	ctx context.Context,
 	db *store.DB,
-	provider ai.Provider,
+	embeddings *ai.EmbeddingRunner,
 	search config.SearchConfig,
 	query string,
 	limit int,
@@ -24,17 +26,18 @@ func semanticSearch(
 	projectID *uuid.UUID,
 	excludeID *uuid.UUID,
 ) ([]thoughttypes.SearchResult, error) {
-	hasEmbeddings, err := db.HasEmbeddingsForModel(ctx, provider.EmbeddingModel(), projectID)
+	model := embeddings.PrimaryModel()
+	hasEmbeddings, err := db.HasEmbeddingsForModel(ctx, model, projectID)
 	if err != nil {
 		return nil, err
 	}
 
 	if hasEmbeddings {
-		embedding, err := provider.Embed(ctx, query)
+		embedding, err := embeddings.EmbedPrimary(ctx, query)
 		if err != nil {
 			return nil, err
 		}
-		return db.SearchSimilarThoughts(ctx, embedding, provider.EmbeddingModel(), threshold, limit, projectID, excludeID)
+		return db.SearchSimilarThoughts(ctx, embedding, model, threshold, limit, projectID, excludeID)
 	}
 
 	return db.SearchThoughtsText(ctx, query, limit, projectID, excludeID)