Tidy up integer parsing #1838

Job	Run time
changes	5s
changes	5s
check-lockfile	5s
check-lockfile	5s
lint-crlf	4s
lint-crlf	4s
lint-newsfile	34s
lint-newsfile	34s
check-sampleconfig	39s
check-sampleconfig	39s
lint	52s
lint	52s
check-schema-delta	38s
check-schema-delta	38s
Typechecking	1m 39s
Typechecking	1m 39s
lint-pydantic	50s
lint-pydantic	50s
lint-clippy	0s
lint-clippy	0s
lint-clippy-nightly	0s
lint-clippy-nightly	0s
lint-rustfmt	0s
lint-rustfmt	0s
linting-done	1s
linting-done	1s
calculate-test-jobs	6s
calculate-test-jobs	6s
portdb (3.8, 11)	3m 2s
portdb (3.8, 11)	3m 2s
complement (monolith, SQLite)	12m 39s
complement (monolith, SQLite)	12m 39s
portdb (3.11, 15)	2m 45s
portdb (3.11, 15)	2m 45s
trial-olddeps	7m 11s
trial-olddeps	7m 11s
trial-pypy	0s
trial-pypy	0s
complement (monolith, Postgres)	13m 18s
complement (monolith, Postgres)	13m 18s
complement (workers, Postgres)	20m 43s
complement (workers, Postgres)	20m 43s
cargo-bench	0s
cargo-bench	0s
cargo-test	0s
cargo-test	0s
trial (3.8, sqlite, all)	4m 40s
trial (3.8, sqlite, all)	4m 40s
trial (3.8, postgres, 11, all)	10m 56s
trial (3.8, postgres, 11, all)	10m 56s
trial (3.8, sqlite)	4m 33s
trial (3.8, sqlite)	4m 33s
sytest (focal)	8m 28s
sytest (focal)	8m 28s
sytest (focal, postgres)	10m 51s
sytest (focal, postgres)	10m 51s
sytest (focal, multi-postgres, workers)	13m 16s
sytest (focal, multi-postgres, workers)	13m 16s
sytest (focal, multi-postgres, workers, asyncio)	19m 29s
sytest (focal, multi-postgres, workers, asyncio)	19m 41s
export-data	2m 11s
export-data	2m 11s
tests-done	2s
tests-done	2s
	4h 39m 26s

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