fix(ilc/server): handle tailor extended errors properly #2074

Job	Run time
Run E2E tests (mysql, mysql, 3306)	4m 13s
Build Registry (src, refs/pull/586/merge)	6m 41s
Run E2E tests (pg, postgres, 5432)	4m 13s
Build ILC (src, refs/pull/586/merge)	7m 33s
Build Registry (dest, master)	6m 34s
Build ILC (dest, master)	2m 19s
Test Registry (src, refs/pull/586/merge, sqlite3)	1m 57s
Test Registry (src, refs/pull/586/merge, mysql, mysql, 3306)	1m 49s
Test Registry (src, refs/pull/586/merge, pg, postgres, 5432)	1m 49s
Test Registry (dest, master, sqlite3)	1m 54s
Test Registry (dest, master, mysql, mysql, 3306)	1m 50s
Test Registry (dest, master, pg, postgres, 5432)	1m 50s
Push images to registry	18s
PR Coverage Report	5m 49s
Build documentation	0s
	48m 49s

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