Correct on Shahab-3 cluster but I wouldn't say Zoljanah is obsolete. It's obviously not as technologically advanced as Qaem-100 but its first stage (solid-fuel) engine is actually more powerful than Raafe and the design overall is much simpler and smaller than Simorgh, so it is a big improvement over Simorgh. It can be a low-end tech but cheap and functional SLV for sending 200kg class satellites to 500km LEO, which is what Iran sorely lacks and is trying hard to develop now.Cluster of Shahab-3 engines is just a mess. Too many failure points. Zoljanah is also obsolete now. It’s 2010 tech.
Unfortunately I suspect they planned the Safir-Simorgh-Sarir lineage long ago (as I mentioned, they were referring to Safir-1, Safir-2 and Safir-3 since all the way back to 2012) - it's hard to abandon Simorgh when Sarir relies on Simorgh's success as well. I think Zoljanah is their plan B in case they have another 1-2 failures with Simorgh, but it doesn't fit into the liquid-fuel plans well at all.
These SLVs will not be scrapped once Soroush is ready, they will still need a cheap and functional smaller SLV to insert 100-400kg class satellites into LEO. Zoljanah fits that bill very well. I suspect Qaem-105 will be very similar to Zoljanah (two identical solid fuel Raafe stages) but with cutting edge tech to compensate for slightly less thrust (resulting in similar overall performance in a smaller and more expensive SLV).
In the second Zoljanah test the first stage engine burned for 65+ seconds and it uses the same engine for the second stage. So I am hopeful.