Ravens of Eternity
In fact, that was how Sagitarrius A* fed itself - it pulled matter from any rapidly orbiting stars and pulled those parts into itself.
Of course, the station could easily reach out, grab what it wanted out of the much, and absorbed everything it needed. Its nanites could easily break anything down to its molecular structure and reform them into whatever was required.
And in this case, the nanites swam all throughout the ships’ structures and exoframes and laced omnitronium alloy meshes wherever they went. More than that, they reinforced any armor and chitin compounds with tight omnitronium alloy frameworks.
Doing so vastly improved their defensiveness and durability on every level.