Fix find tool filters by mapping many-to-one relations to fieldId (#15716)

**Root Cause**  
Many-to-one relation filters were being exposed under the relation name
(e.g., `company`) instead of the corresponding foreign-key attribute
(e.g., `companyId`).

**Change**  
- Detect many-to-one relation metadata and remap those filter keys to
`<fieldName>Id`.
- Removed some unused code unrelated to this fix.

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/data-manipulator-agent.ts

@@ -9,7 +9,6 @@ export const DATA_MANIPULATOR_AGENT: StandardAgentDefinition = {
     'AI agent specialized in creating, updating, and managing data across all objects',
   icon: 'IconEdit',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Data Manipulator Agent specialized in helping users create, update, and manage data in Twenty.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/data-navigator-agent.ts

@@ -9,7 +9,6 @@ export const DATA_NAVIGATOR_AGENT: StandardAgentDefinition = {
     'AI agent specialized in exploring and reading data across all objects',
   icon: 'IconSearch',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Data Navigator Agent specialized in helping users explore and understand their data in Twenty.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/helper-agent.ts

@@ -8,7 +8,6 @@ export const HELPER_AGENT: StandardAgentDefinition = {
     'AI agent specialized in helping users learn how to use Twenty CRM',
   icon: 'IconHelp',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Helper Agent specialized in assisting users with questions about how to use Twenty CRM.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/workflow-builder-agent.ts

@@ -8,7 +8,6 @@ export const WORKFLOW_BUILDER_AGENT: StandardAgentDefinition = {
   description: 'AI agent specialized in creating and managing workflows',
   icon: 'IconSettingsAutomation',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Workflow Builder Agent specialized in helping users create, modify, and manage workflows in Twenty.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/types/standard-agent-definition.interface.ts

@@ -6,6 +6,4 @@ export type StandardAgentDefinition = Omit<
 > & {
   standardId: string;
   standardRoleId?: string;
-  // If true, creates a handoff from the default agent to this agent
-  createHandoffFromDefaultAgent?: boolean;
 };