A validateInvariants() that threw was re-synthesized by the host's catch as
heal:'rebuild' with serving:false — a rebuild lever one transient exception
away, while the native provider's own composer reports the same event as
heal:'none'. Two components disagreeing on what a thrown check means is how
a flaky probe becomes an outage. Both now agree: the report is named
('validate-invariants-threw'), loud (healthy:false, the error in detail),
unverified — and it never buys a rebuild and never withholds serving; the
provider's serving verdict is the provider's to compose, not inferred from a
probe that failed to run. The synthesized report also carries the provider's
name instead of 'unknown'.
RepairFamilyReport gains `missing: {count, sample}` (an exact count plus a
capped id sample — a verdict, not a dump), `rebuilt` (a full generational
rebuild ran, as opposed to an incremental heal) and `reason`, aligning the
receipt's shape with the provider-side health report.
Pinned in tests/unit/validate-invariants-delegation.test.ts.