add core instances in relational compiler

[AFine-gs]

What type of PR is this?

Adds missing core instance to compiler

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Test Results

  1 033 files  ±0    1 033 suites  ±0   1h 26m 42s :stopwatch: +30s 12 270 tests ±0  12 180 :heavy_check_mark: ±0  90 :zzz: ±0  0 :x: ±0  17 961 runs  ±0  17 871 :heavy_check_mark: ±0  90 :zzz: ±0  0 :x: ±0 

Results for commit 8695d580. ± Comparison against base commit d6ccbce1.