Fix threaded draft email replies (#22175)

## Summary

Fixes Gmail and Microsoft draft replies so workflow-created drafts stay
attached to the existing provider thread.

Fixes twentyhq/core-team-issues#2597.

## Root cause

The email composer already resolved `threadExternalId` and `references`
from `inReplyTo`, but `DraftEmailTool` only forwarded `inReplyTo` to the
outbound draft service. Gmail therefore created a raw draft without
`message.threadId`, which lets the draft appear as a standalone compose
instead of an inline thread reply.

For Microsoft, the draft path used Graph `createReply`, but parent
lookup filtered on a URL-encoded `internetMessageId`. That can miss the
parent message and fall back to creating a new draft message instead of
a reply draft.

## Changes

- Forward `threadExternalId` and `references` from `DraftEmailTool` to
outbound draft creation.
- Set Gmail draft `message.threadId` when `threadExternalId` is
available.
- Make Microsoft parent lookup use Graph request query builders with
OData string escaping, so `createReply` is reached reliably.
- Add targeted Jest coverage for the Draft Email tool, Gmail draft
threading, and Microsoft reply-draft creation.

## Validation

- `NX_DAEMON=false
/Users/thomascolasdesfrancs/.cache/codex-runtimes/codex-primary-runtime/dependencies/node/bin/node
../../node_modules/nx/dist/bin/nx.js jest twenty-server --
--runTestsByPath
src/engine/core-modules/tool/tools/email-tool/__tests__/draft-email-tool.spec.ts
src/modules/messaging/message-outbound-manager/drivers/gmail/services/__tests__/gmail-message-outbound.service.spec.ts
src/modules/messaging/message-outbound-manager/drivers/microsoft/services/__tests__/microsoft-message-outbound.service.spec.ts
--runInBand`
- `NX_DAEMON=false
/Users/thomascolasdesfrancs/.cache/codex-runtimes/codex-primary-runtime/dependencies/node/bin/node
./node_modules/nx/dist/bin/nx.js lint:diff-with-main twenty-server`

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---------

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Félix Malfait <FelixMalfait@users.noreply.github.com>

packages/twenty-server/src/engine/core-modules/tool/tools/email-tool/__tests__/draft-email-tool.spec.ts

@@ -79,13 +79,20 @@ describe('DraftEmailTool', () => {
   });
 
   it('creates the draft when the resolved account has the compose scope', async () => {
-    mockComposeEmail.mockResolvedValue({
-      success: true,
-      data: buildComposedEmail({
+    const composedEmail = {
+      ...buildComposedEmail({
         id: 'account-1',
         provider: ConnectedAccountProvider.GOOGLE,
         scopes: [GMAIL_COMPOSE_SCOPE],
       }),
+      inReplyTo: '<parent@example.com>',
+      threadExternalId: 'thread-external-id',
+      references: ['<ancestor@example.com>', '<parent@example.com>'],
+    };
+
+    mockComposeEmail.mockResolvedValue({
+      success: true,
+      data: composedEmail,
     });
 
     const result = await tool.execute(baseInput, {
@@ -94,5 +101,13 @@ describe('DraftEmailTool', () => {
 
     expect(result.success).toBe(true);
     expect(mockCreateDraft).toHaveBeenCalledTimes(1);
+    expect(mockCreateDraft).toHaveBeenCalledWith(
+      expect.objectContaining({
+        inReplyTo: composedEmail.inReplyTo,
+        threadExternalId: composedEmail.threadExternalId,
+        references: composedEmail.references,
+      }),
+      composedEmail.connectedAccount,
+    );
   });
 });

packages/twenty-server/src/engine/core-modules/tool/tools/email-tool/draft-email-tool.ts

@@ -114,6 +114,8 @@ export class DraftEmailTool implements Tool {
         html: data.sanitizedHtmlBody,
         attachments: data.attachments,
         inReplyTo: data.inReplyTo,
+        threadExternalId: data.threadExternalId,
+        references: data.references,
       },
       data.connectedAccount,
     );