chore(server): add detail for error (#13151)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Error messages for unavailable copilot providers now include specific
model IDs for clearer context.
* Added new detailed error messages for embedding generation failures
specifying provider and error details.
* The API and GraphQL schema have been extended with new error types
reflecting these detailed error cases.

* **Bug Fixes**
* Enhanced error handling to detect and report incomplete or missing
embeddings from providers.
* Added safeguards to skip embedding insertions when no embeddings are
provided, preventing unnecessary processing.

* **Documentation**
* Updated localization and translation keys to support dynamic error
messages with model IDs and provider details.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/models/copilot-context.ts

@@ -165,6 +165,13 @@ export class CopilotContextModel extends BaseModel {
     fileId: string,
     embeddings: Embedding[]
   ) {
+    if (embeddings.length === 0) {
+      this.logger.warn(
+        `No embeddings provided for contextId: ${contextId}, fileId: ${fileId}. Skipping insertion.`
+      );
+      return;
+    }
+
     const values = this.processEmbeddings(contextId, fileId, embeddings);
 
     await this.db.$executeRaw`
@@ -204,6 +211,13 @@ export class CopilotContextModel extends BaseModel {
     docId: string,
     embeddings: Embedding[]
   ) {
+    if (embeddings.length === 0) {
+      this.logger.warn(
+        `No embeddings provided for workspaceId: ${workspaceId}, docId: ${docId}. Skipping insertion.`
+      );
+      return;
+    }
+
     const values = this.processEmbeddings(
       workspaceId,
       docId,

packages/backend/server/src/models/copilot-workspace.ts

@@ -283,6 +283,13 @@ export class CopilotWorkspaceConfigModel extends BaseModel {
     fileId: string,
     embeddings: Embedding[]
   ) {
+    if (embeddings.length === 0) {
+      this.logger.warn(
+        `No embeddings provided for workspaceId: ${workspaceId}, fileId: ${fileId}. Skipping insertion.`
+      );
+      return;
+    }
+
     const values = this.processEmbeddings(workspaceId, fileId, embeddings);
     await this.db.$executeRaw`
           INSERT INTO "ai_workspace_file_embeddings"