📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830)

* chore: move database model methods to /packages/data-schemas

* chore: add TypeScript ESLint rule to warn on unused variables

* refactor: model imports to streamline access

- Consolidated model imports across various files to improve code organization and reduce redundancy.
- Updated imports for models such as Assistant, Message, Conversation, and others to a unified import path.
- Adjusted middleware and service files to reflect the new import structure, ensuring functionality remains intact.
- Enhanced test files to align with the new import paths, maintaining test coverage and integrity.

* chore: migrate database models to packages/data-schemas and refactor all direct Mongoose Model usage outside of data-schemas

* test: update agent model mocks in unit tests

- Added `getAgent` mock to `client.test.js` to enhance test coverage for agent-related functionality.
- Removed redundant `getAgent` and `getAgents` mocks from `openai.spec.js` and `responses.unit.spec.js` to streamline test setup and reduce duplication.
- Ensured consistency in agent mock implementations across test files.

* fix: update types in data-schemas

* refactor: enhance type definitions in transaction and spending methods

- Updated type definitions in `checkBalance.ts` to use specific request and response types.
- Refined `spendTokens.ts` to utilize a new `SpendTxData` interface for better clarity and type safety.
- Improved transaction handling in `transaction.ts` by introducing `TransactionResult` and `TxData` interfaces, ensuring consistent data structures across methods.
- Adjusted unit tests in `transaction.spec.ts` to accommodate new type definitions and enhance robustness.

* refactor: streamline model imports and enhance code organization

- Consolidated model imports across various controllers and services to a unified import path, improving code clarity and reducing redundancy.
- Updated multiple files to reflect the new import structure, ensuring all functionalities remain intact.
- Enhanced overall code organization by removing duplicate import statements and optimizing the usage of model methods.

* feat: implement loadAddedAgent and refactor agent loading logic

- Introduced `loadAddedAgent` function to handle loading agents from added conversations, supporting multi-convo parallel execution.
- Created a new `load.ts` file to encapsulate agent loading functionalities, including `loadEphemeralAgent` and `loadAgent`.
- Updated the `index.ts` file to export the new `load` module instead of the deprecated `loadAgent`.
- Enhanced type definitions and improved error handling in the agent loading process.
- Adjusted unit tests to reflect changes in the agent loading structure and ensure comprehensive coverage.

* refactor: enhance balance handling with new update interface

- Introduced `IBalanceUpdate` interface to streamline balance update operations across the codebase.
- Updated `upsertBalanceFields` method signatures in `balance.ts`, `transaction.ts`, and related tests to utilize the new interface for improved type safety.
- Adjusted type imports in `balance.spec.ts` to include `IBalanceUpdate`, ensuring consistency in balance management functionalities.
- Enhanced overall code clarity and maintainability by refining type definitions related to balance operations.

* feat: add unit tests for loadAgent functionality and enhance agent loading logic

- Introduced comprehensive unit tests for the `loadAgent` function, covering various scenarios including null and empty agent IDs, loading of ephemeral agents, and permission checks.
- Enhanced the `initializeClient` function by moving `getConvoFiles` to the correct position in the database method exports, ensuring proper functionality.
- Improved test coverage for agent loading, including handling of non-existent agents and user permissions.

* chore: reorder memory method exports for consistency

- Moved `deleteAllUserMemories` to the correct position in the exported memory methods, ensuring a consistent and logical order of method exports in `memory.ts`.

api/server/controllers/agents/openai.js

@@ -24,9 +24,6 @@ const {
 const { loadAgentTools, loadToolsForExecution } = require('~/server/services/ToolService');
 const { createToolEndCallback } = require('~/server/controllers/agents/callbacks');
 const { findAccessibleResources } = require('~/server/services/PermissionService');
-const { spendTokens, spendStructuredTokens } = require('~/models/spendTokens');
-const { getConvoFiles } = require('~/models/Conversation');
-const { getAgent, getAgents } = require('~/models/Agent');
 const db = require('~/models');
 
 /**
@@ -139,7 +136,7 @@ const OpenAIChatCompletionController = async (req, res) => {
   const agentId = request.model;
 
   // Look up the agent
-  const agent = await getAgent({ id: agentId });
+  const agent = await db.getAgent({ id: agentId });
   if (!agent) {
     return sendErrorResponse(
       res,
@@ -206,7 +203,7 @@ const OpenAIChatCompletionController = async (req, res) => {
         isInitialAgent: true,
       },
       {
-        getConvoFiles,
+        getConvoFiles: db.getConvoFiles,
         getFiles: db.getFiles,
         getUserKey: db.getUserKey,
         getMessages: db.getMessages,
@@ -490,7 +487,7 @@ const OpenAIChatCompletionController = async (req, res) => {
     const balanceConfig = getBalanceConfig(appConfig);
     const transactionsConfig = getTransactionsConfig(appConfig);
     recordCollectedUsage(
-      { spendTokens, spendStructuredTokens },
+      { spendTokens: db.spendTokens, spendStructuredTokens: db.spendStructuredTokens },
       {
         user: userId,
         conversationId,
@@ -599,7 +596,7 @@ const ListModelsController = async (req, res) => {
     // Get the accessible agents
     let agents = [];
     if (accessibleAgentIds.length > 0) {
-      agents = await getAgents({ _id: { $in: accessibleAgentIds } });
+      agents = await db.getAgents({ _id: { $in: accessibleAgentIds } });
     }
 
     const models = agents.map((agent) => ({
@@ -642,7 +639,7 @@ const GetModelController = async (req, res) => {
       return sendErrorResponse(res, 401, 'Authentication required', 'auth_error');
     }
 
-    const agent = await getAgent({ id: model });
+    const agent = await db.getAgent({ id: model });
 
     if (!agent) {
       return sendErrorResponse(