feat(traffic-flow): enhance traffic flow analytics and overlay configuration

- Updated the traffic flow analytics to include new state variables for named bytes, total bytes, and window seconds, improving data granularity.
- Modified the NetworkMapPage to display classified traffic data, including a new section for showing classified and total bytes.
- Enhanced the applyFlowOverlay function to support a new option for disabling GRE fast path, allowing for more flexible traffic flow configurations.
- Added a toggle in the FlowOverlaySheet component to enable or disable the GRE fast path setting, improving user control over traffic processing.
- Updated tests to validate the new functionalities and ensure accurate traffic flow analytics.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/traffic-flow.ts

@@ -113,6 +113,7 @@ async function applyOverlayHandler(req: FastifyRequest, reply: FastifyReply) {
     const result = await applyFlowOverlay(parsed.data.serverId, {
       publicEndpoint: parsed.data.publicEndpoint,
       requestHost: requestPublicHost(req),
+      disableGreFastPath: parsed.data.disableGreFastPath,
     })
     return reply.send(result)
   } catch (e) {