[codex] Tolerate absolute file tool paths (#632) #6526

Job	Run time
build-and-check	3m 5s
test-integration-packages/billing	1m 3s
test-integration-packages/internal	1m 12s
test-integration-common	43s
test-integration-web	48s
test-integration-cli	47s
test-cli	53s
test-integration-packages/agent-runtime	51s
test-integration-sdk	1m 19s
test-packages/agent-runtime	47s
test-.agents	42s
test-web	1m 32s
test-packages/internal	55s
test-common	46s
test-packages/billing	40s
test-sdk	48s
	16m 51s

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