feat(oraclemcp): oracle_compare_schemas / migration generation (P3-4,… #27

Job	Run time
accretion tripwire (monotone coverage_index — REQUIRED)	2m 28s
gate self-test (adversarial trio — REQUIRED)	3m 8s
§5 acceptance proof (nightly DoD; estate-aware)	0s
	5m 36s

Provide feedback