* test: remove 151 unit tests fully covered by integration tests
Per-test coverage analysis confirmed every statement and branch these
tests exercise is already covered by the provider-integration suite.
Removes 8 fully redundant test files and 132 individual tests from
54 files (2,598 lines). Coverage unchanged at 82.4% statements / 84.5%
lines, both above configured thresholds.
* fix: restore package export-map contract test
This test validates the package.json exports field, not runtime code.
Its Istanbul fingerprint is empty, making it trivially "subsumed" by
the coverage analysis — but no integration test checks the export map.
* fix: remove unused imports left behind by test pruning
* fix: restore snapshot-routing contract test, remove orphaned comment
snapshot-routing.test.ts validates that every command in the snapshot
catalog has a handler — a structural check invisible to Istanbul.
Same false-positive pattern as package-exports.test.ts.
Michał Pierzchała