BLU-109s can penetrate approximately 6 ft (1.8m) of concrete. It's unknown how deeply buried Hezbollah HQ was, but it's clear that the Israelis made successive hits at multiple points to penetrate it.
During the meeting with Bagheri, key Russian officials included Shoigu's deputy Venediktov, and also Dmitry Shugaev. Shugaev is Director of the Federal Service for Military-Technical Cooperation, responsible for military-technical cooperation between Russia and foreign countries. 
I've seen some say this was a Falaq rocket. Falaqs have relatively large (50+kg) warheads.
It could be the booster section of a Blue Sparrow target ALBM which has a separable payload section. However there is no reported sighting or hearing of impact anywhere in Iraq or Iran of the payload section. 
Kheybar-Shekan (solid-fueled)
Israel's "win" was military-technical in nature. It claims to have destroyed all drones and cruise missiles, while intercepting most - but not all - ballistic missiles.
The tweet above is obviously referring to the visible heating on the MaRV, screenshot taken from the below launch and impact video. The MaRV is only really visible for a couple of frames.
The Parchamdar ("flag-bearer") documentary mainly focuses on Shahed aviation industries, which had been handed over a part of Iran's drone activities after development stalled due to a series of crashes and disappointments in the mid-late 90s. 
Many have discussed the Yak-130's combat capabilities as a possible reason. But the Yak-130 is unlikely to see much use as a combat aircraft in the IRIAF, which has a host of older and more modern attack aircraft available. 
Before we get onto the MaRV, its pertinent to look at the first-stage booster. From the shape of the fins it looks based on the Kheybar-Shekan. It's launched at an angle (not vertically), implying a quasi-ballistic (mostly in-atmosphere) flight profile.
The production version has a significant number of external changes since the initial prototype, resulting in an overall sleeker airframe. 
So far Iranian shipping container missiles have been Fath/Fateh-class short-range ballistic missiles, and foreign concepts (incl. RU/CH/US) have toyed with different potential uses for this concept. 
However, Oghab-44's isolated position means it does not benefit from the SAM protection (excepting S-200 coverage) afforded to Bandar Abbas, the home of the IRIN. It's possible the area will be given better cover once the base is fully operational*. 
The canisters on Sahand still sport the desert camo, but the erecting arm - which is the same type as used on land-based TELs - is in navy colours. 
The rocket showed high acceleration at launch. This is typical of solid-fuel SLVs, but here it is more pronounced as the launch in question is a sub-orbital test-launch with no word on how much the boilerplate and/or telemetry equipment weighted.
