perf: read JS/TS files once during discovery export checks #272

Job	Run time
determine-changes / detect	8s
check-linked-issue	3s
coverage	6m 59s
unit-tests (ubuntu-latest, 3.9)	8m 14s
type-check	24s
unit-tests (ubuntu-latest, 3.13)	7m 14s
unit-tests (ubuntu-latest, 3.12)	6m 56s
prek / prek	31s
unit-tests (ubuntu-latest, 3.14)	6m 5s
unit-tests (windows-latest, 3.13)	10m 53s
unit-tests (ubuntu-latest, 3.10)	7m 54s
e2e-python (tracer-replay, end_to_end_test_tracer_replay.py, 10)	5m 37s
e2e-python (coverage-e2e, end_to_end_test_coverage.py, black)	5m 12s
e2e-python (bubble-sort-unittest, end_to_end_test_bubblesort_unittest.py, 40)	4m 25s
e2e-python (topological-sort, end_to_end_test_topological_sort_worktree.py, 5)	2m 19s
unit-tests (ubuntu-latest, 3.11)	6m 31s
e2e-python (futurehouse-structure, end_to_end_test_futurehouse.py, 5)	3m 10s
e2e-python (async-optimization, end_to_end_test_async.py, 10)	21m 35s
e2e-python (bubble-sort-pytest-nogit, end_to_end_test_bubblesort_pytest.py, 70, true)	7m 44s
e2e-python (init-optimization, end_to_end_test_init_optimization.py, 10)	2m 31s
e2e-python (benchmark-bubble-sort, end_to_end_test_benchmark_sort.py, 5)	4m 41s
e2e-java	0s
e2e-js	0s
required checks passed	3s
	1h 59m 9s

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