fix: ih_schema.sql to comply with eclipse-edc/IdentityHub#451

[ligaz]

What this PR changes/adds

This change adds the missing key_context in keypair_resource that was introduced in eclipse-edc/IdentityHub#451.

Why it does that

Without having this column the services start with an error and does not work as expected:

Exception in thread "main" org.eclipse.edc.spi.EdcException: org.eclipse.edc.spi.persistence.EdcPersistenceException: ERROR: column "key_context" of relation "keypair_resource" does not exist
  Position: 181
	at org.eclipse.edc.boot.system.runtime.BaseRuntime.onError(BaseRuntime.java:143)
	at org.eclipse.edc.boot.system.runtime.BaseRuntime.boot(BaseRuntime.java:106)
	at org.eclipse.edc.boot.system.runtime.BaseRuntime.main(BaseRuntime.java:77)
Caused by: org.eclipse.edc.spi.persistence.EdcPersistenceException: ERROR: column "key_context" of relation "keypair_resource" does not exist
  Position: 181
	at org.eclipse.edc.sql.SqlQueryExecutor.execute(SqlQueryExecutor.java:59)
	at org.eclipse.edc.identityhub.store.sql.keypair.SqlKeyPairResourceStore.lambda$create$0(SqlKeyPairResourceStore.java:57)

(full stack trace omitted)

Further notes

I'm not sure how such breaking changes should be propagated to downstream consumers like this sample repo. Maybe the versions of the IdentityHub (and other dependencies) should be pinned.

[paullatzelsperger]

this is a temporary fix at best. IH and other components now come with a SqlSchemaBootstrapper that automatically creates the DB schema. Please sign the ECA so we can run, review and ultimately merge your PR

[ligaz]

this is a temporary fix at best. IH and other components now come with a SqlSchemaBootstrapper that automatically creates the DB schema. Please sign the ECA so we can run, review and ultimately merge your PR

Thanks for your clarifications. I just signed the ECA.