fix: Add lowercase `Content-type` header to event-stream responses for improved compatibility.

src/equipment/router.py

@@ -129,6 +129,7 @@ async def simulate_equipment(db_session: DbSession, assetnum: str):
         yield f"data: {json.dumps({'status':'done','message':f'Simulation for {assetnum} completed successfully','data':combined})}\n\n"
 
     headers = {
+        "Content-type": "text/event-stream",
         "Content-Type": "text/event-stream",
         "Cache-Control": "no-cache, no-transform",
         "Connection": "keep-alive",
@@ -179,6 +180,7 @@ async def simulate_all_equipment(db_session: DbSession):
         yield f"data: {json.dumps({'status':'done', 'message':f'All simulations completed. Success: {success_count}, Errors: {error_count}'})}\\n\\n"
 
     headers = {
+        "Content-type": "text/event-stream",
         "Content-Type": "text/event-stream",
         "Cache-Control": "no-cache, no-transform",
         "Connection": "keep-alive",