The arriving fleet took its time to reach Cinach VI. The temporary crew of the recently-built factory ship had to perform a lot of inspections in order to check for any problems arising from her maiden voyage.
Properly speaking, every newly-built starship had to go through at least one comprehensive shakedown cruise.
The bigger the vessel, the greater amount of parts. The greater amount of parts, the greater the probability that something might go wrong!
These days, the space trials of sub-capital ships didn't need to be comprehensive. Advanced scanners and technology-assisted inspections already helped with making sure that none of their parts were abnormal.
Capital ships were different!
Their total volume exceeded that of typical cities. They had so many decks filled with huge, interconnected ship components that no amount of inspection could ensure that they would all run smoothly!