fix: enable GitHub connector to sync PRs and issues by default (#14062)

Fixes #13975

## Problem
The GitHub data source connector had both `include_pull_requests` and
`include_issues` defaulting to `false` in both the frontend form and the
backend sync code. This meant that with the default configuration, **no
content was synced at all** from a GitHub repository — silently
producing zero results.

Additionally, the form field labels contained a typo: "Inlcude" instead
of "Include".

## Solution
- Changed `include_pull_requests` default from `false` to `true` in the
frontend form fields and default values
- Changed `include_issues` default from `false` to `true` in the
frontend form fields and default values
- Changed both backend defaults in `sync_data_source.py` from `False` to
`True`
- Fixed label typos: "Inlcude Pull Requests" → "Include Pull Requests"
and "Inlcude Issues" → "Include Issues"

This makes the GitHub connector consistent with the GitLab connector,
which already defaults `include_mrs`, `include_issues`, and
`include_code_files` all to `true`.

## Testing
- The connector now syncs both pull requests and issues by default when
a new GitHub data source is created
- Users who want to exclude PRs or issues can uncheck the corresponding
checkboxes in the form

Co-authored-by: octo-patch <octo-patch@github.com>

rag/svr/sync_data_source.py

@@ -1235,8 +1235,8 @@ class Github(SyncBase):
         self.connector = GithubConnector(
             repo_owner=self.conf.get("repository_owner"),
             repositories=self.conf.get("repository_name"),
-            include_prs=self.conf.get("include_pull_requests", False),
-            include_issues=self.conf.get("include_issues", False),
+            include_prs=self.conf.get("include_pull_requests", True),
+            include_issues=self.conf.get("include_issues", True),
         )
 
         credentials = self.conf.get("credentials", {})

web/src/pages/user-setting/data-source/constant/index.tsx

@@ -856,18 +856,18 @@ export const DataSourceFormFields = {
       required: true,
     },
     {
-      label: 'Inlcude Pull Requests',
+      label: 'Include Pull Requests',
       name: 'config.include_pull_requests',
       type: FormFieldType.Checkbox,
       required: false,
-      defaultValue: false,
+      defaultValue: true,
     },
     {
-      label: 'Inlcude Issues',
+      label: 'Include Issues',
       name: 'config.include_issues',
       type: FormFieldType.Checkbox,
       required: false,
-      defaultValue: false,
+      defaultValue: true,
     },
   ],
   [DataSourceKey.IMAP]: [
@@ -1622,8 +1622,8 @@ export const DataSourceFormDefaultValues = {
     config: {
       repository_owner: '',
       repository_name: '',
-      include_pull_requests: false,
-      include_issues: false,
+      include_pull_requests: true,
+      include_issues: true,
       credentials: {
         github_access_token: '',
       },