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Tenancy walk perf + WHERE-only leak fix, PermissionDenied, TenantDeleted, validator related fields, wait_for, tooling checks, test gaps (#491 #512 #514 #518 #520 #558 #559) #519

Job	Run time
JS tests (Vitest)	1m 17s
JS lint & format	24s
Package build (release dry-run)	12s
JS build (Vite)	2m 49s
File size (300-line cap)	2m 57s
Perf guards (Playwright)	3m 48s
E2E smoke (Playwright)	2m 21s
Migrations round trip (Postgres)	2m 30s
Python typecheck	19s
Python tests	11m 30s
JS typecheck	49s
Python lint & format	23s
PR checks	3m 14s
	32m 33s