lint

fix: exchange rate uses core api endpoint #54

Job	Run time
lint / bundle / checkbundle (3.10)	41s
lint / prettier / checkprettier (3.10)	35s
lint / black (3.10) / checkblack (3.10)	33s
lint / black (3.11) / checkblack (3.11)	1m 22s
lint / black (3.12) / checkblack (3.12)	1m 20s
lint / mypy (3.10) / mypy (3.10)	44s
lint / mypy (3.11) / mypy (3.11)	1m 17s
lint / mypy (3.12) / mypy (3.12)	1m 22s
lint / pyright (3.10) / pyright (3.10)	34s
lint / pyright (3.12) / pyright (3.12)	1m 9s
lint / pyright (3.11) / pyright (3.11)	1m 14s
lint / ruff (3.10) / checkruff (3.10)	22s
lint / ruff (3.11) / checkruff (3.11)	1m 9s
lint / ruff (3.12) / checkruff (3.12)	1m 17s
	13m 39s

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