fix: watch worktree path for implementation_plan.json changes (#1805) #7411

Job	Run time
test-frontend (macos-latest)	1m 42s
test-python (3.12, ubuntu-latest)	1m 34s
test-python (3.12, macos-latest)	1m 29s
test-python (3.13, ubuntu-latest)	49s
test-frontend (ubuntu-latest)	1m 35s
test-python (3.12, windows-latest)	3m 18s
test-frontend (windows-latest)	2m 53s
CI Complete	2s
	13m 22s

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