feat: add stats to understand processing speeds #299

Job	Run time
crystal-style / crystal-style	1m 39s
dockerfile-style / dockerfile-style	8s
test / 🚧 crystal: unstable, MT: ☐, canary: ☐	1m 22s
test / crystal: latest, MT: ☐, canary: ☐	1m 31s
test / TODOs → GitHub Issues	0s
	4m 40s

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