Bump python-multipart from 0.0.12 to 0.0.16 #3646

Job	Run time
check-lockfile	4s
changes	2s
lint-crlf	4s
lint-newsfile	0s
check-schema-delta	39s
check-sampleconfig	4m 48s
lint	3m 9s
Typechecking	2m 45s
lint-clippy	0s
lint-pydantic	2m 13s
lint-clippy-nightly	0s
lint-readme	0s
lint-rustfmt	0s
linting-done	3s
calculate-test-jobs	6s
portdb (3.8, 11)	6m 9s
complement (monolith, SQLite)	13m 31s
trial-olddeps	8m 14s
portdb (3.11, 15)	5m 52s
complement (monolith, Postgres)	13m 55s
complement (workers, Postgres)	21m 33s
trial-pypy	0s
cargo-test	0s
cargo-bench	0s
sytest (focal)	8m 31s
trial (3.8, sqlite, all)	9m 38s
sytest (focal, postgres)	10m 33s
trial (3.8, postgres, 11, all)	15m 27s
sytest (focal, multi-postgres, workers)	13m 23s
trial (3.8, sqlite)	8m 11s
sytest (focal, multi-postgres, workers, asyncio)	19m 12s
export-data	5m 8s
tests-done	2s
	2h 53m 12s

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