fix: disambiguate GitLab webhook repo lookup to prevent MultipleObjectsReturned #3876

Job	Run time
change-detection	5s
Run Lint	12s
Build Requirements / Build Requirements	16s
API CI / Build App (API) / Build Test App	1m 31s
API CI / Build App (API) / Build App	1m 3s
Worker CI / Build App (Worker)	0s
Worker CI / Test (Worker)	0s
Shared CI / Build App (Shared)	0s
Shared CI / Benchmarks (Shared)	0s
Worker CI / Build Self Hosted (Worker)	0s
Shared CI / Test (Shared)	0s
Worker CI / Push Production Image (Worker)	0s
Worker CI / Required checks (Worker)	0s
Shared CI / Required checks (Shared)	0s
Worker CI / Trigger worker deployment	0s
Worker CI / Push Self Hosted Image (Worker)	0s
API CI / Test (API) / Test	5m 56s
API CI / Test (API) / Upload to Codecov	0s
API CI / Required checks (API)	3s
API CI / Build Self Hosted (API)	0s
API CI / Push Production Image (API)	0s
API CI / Push Self Hosted Image (API)	0s
Push to staging	0s
API CI / Trigger codecov-api deployment	-1s
	9m 5s

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