⏳ refactor: MCP OAuth Polling with Gradual Backoff and Timeout Handling (#9752)

* refactor: Implement gradual backoff polling for oauth connection status with timeout handling

* refactor: Enhance OAuth polling with gradual backoff and timeout handling; update reconnection tracking

* refactor: reconnection timeout behavior in OAuthReconnectionManager and OAuthReconnectionTracker

- Implement tests to verify reconnection timeout handling, including tracking of reconnection states and cleanup of timed-out entries.
- Enhance existing methods in OAuthReconnectionManager and OAuthReconnectionTracker to support timeout checks and cleanup logic.
- Ensure proper handling of multiple servers with different timeout periods and edge cases for active states.

* chore: remove comment

* refactor: Enforce strict 3-minute OAuth timeout with updated polling intervals and improved timeout handling

* refactor: Remove unused polling logic and prevent duplicate polling for servers in MCP server manager

* refactor: Update localization key for no memories message in MemoryViewer

* refactor: Improve MCP tool initialization by handling server failures

- Introduced a mechanism to track failed MCP servers, preventing retries for unavailable servers.
- Added logging for failed tool creation attempts to enhance debugging and monitoring.

* refactor: Update reconnection timeout to enforce a strict 3-minute limit

* ci: Update reconnection timeout tests to reflect a strict 3-minute limit

* ci: Update reconnection timeout tests to enforce a strict 3-minute limit

* chore: Remove unused MCP connection timeout message

client/src/components/SidePanel/Memories/MemoryViewer.tsx

@@ -362,7 +362,7 @@ export default function MemoryViewer() {
                     colSpan={hasUpdateAccess ? 2 : 1}
                     className="h-24 text-center text-sm text-text-secondary"
                   >
-                    {localize('com_ui_no_data')}
+                    {localize('com_ui_no_memories')}
                   </TableCell>
                 </TableRow>
               )}