worker: collections adaptor isn't loaded if `collections.get` isn't on one line

When the worker loads a Run, it has to decide whether to load the collections adaptor into it.

The test for this is terrible (my fault):

if (job.expression?.match(/(collections\.)/)) {
  hasCollections = true;
}

I did this because I didn't want to do AST parsing just to see if the collections variable is being used. But this is clearly way too brittle

Options:

• Always load the collections adaptor (does look weird in the run log)
• Always load the collections adaptor if the word collections appears anywhere (slightly permissive than we have now)
• Write a better regex (look for whole word collections but not in a comment or string)
• Use the compiler to preparse and find a "dangling global"

Start by reproducing the worker's Run-loading behavior with a multiline use of collections.get, then inspect how the current collections. match decides whether to load the adaptor. Done means an agreed approach reliably detects the intended usage without the current formatting limitation, with coverage for the reported case.