Pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
apache/apisix		pinDigest	→ d369ead
digitalcredentials/issuer-coordinator		pinDigest	→ 8610376
digitalcredentials/signing-service		pinDigest	→ 2a2e2fe
docker/dockerfile	syntax	pinDigest	→ 87999aa
postgres (source)	service	pinDigest	→ 2bc89ee
postgres (source)		pinDigest	→ 2bc89ee
quay.io/keycloak/keycloak		pinDigest	→ f1f1f01
varnish		pinDigest	→ 4c27969

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