[preview PFNs only] replace normal API with long poll

[bchocho]

[trunk-io[bot]]

⏱️ 22h 50m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-unit-coverage	12h	🟥
rust-smoke-coverage	3h 42m	🟩
windows-build	2h 6m	🟩 🟩 🟩 🟥 🟩 (+1 more)
rust-unit-tests	2h 4m	🟥 🟥 🟥 🟥 🟥
rust-images / rust-all	1h 16m	🟩 🟩 🟩 🟥 🟩
rust-lints	28m	🟥 🟥 🟥 🟥 🟥
check	20m	🟥 🟥 🟥 🟥 🟥
run-tests-main-branch	20m	🟩 🟩 🟥 🟥 🟥
check-dynamic-deps	14m	🟩 🟩 🟩 🟩 🟩 (+1 more)
general-lints	11m	🟩 🟩 🟩 🟩 🟩
semgrep/ci	4m	🟩 🟩 🟩 🟩 🟩 (+1 more)
file_change_determinator	59s	🟩 🟩 🟩 🟩 🟩
file_change_determinator	54s	🟩 🟩 🟩 🟩 🟩
file_change_determinator	47s	🟩 🟩 🟩 🟩 🟩 (+1 more)
permission-check	22s	🟩 🟩 🟩 🟩 🟩 (+1 more)
permission-check	17s	🟩 🟩 🟩 🟩 🟩 (+1 more)
permission-check	15s	🟩 🟩 🟩 🟩 🟩 (+1 more)
permission-check	14s	🟩 🟩 🟩 🟩 🟩 (+1 more)
permission-check	14s	🟩 🟩 🟩 🟩 🟩 (+1 more)
determine-docker-build-metadata	10s	🟩 🟩 🟩 🟩 🟩

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[github-actions[bot]]

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