The Rust worker is the product: edge/, built and checked in CI

User: Rust is the product (option a). tools/edge-bench-rs moves to edge/
(crate edge; binaries edge-node, the worker, and edge-bench, the replay).
CI's new job edge runs cargo test and edge/check-fixtures.sh: both
RangeIndexers on three committed captures (edge/fixtures, 25k overview
lines each of a.b.models, a.b.ath and a.b.boneless in 5 chunks, 3.5 MB),
compared field by field with check.ts; deploy waits for it. The
TypeScript RangeIndexer stays as check.ts's reference. README: what it
is now; the benchmark findings as history.

Random names: looksRandom missed long tokens of capitals and digits
("51294P1CUKR2R35X", release 74539068, readable and a Newznab title).
12+ capitals and digits switching 6+ times between them are random
(COD4MW2REMASTERED switches 4 times, BEATLES1964REMASTER twice); both
implementations, identical on the fixtures.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/unit/release/identity.spec.ts

@@ -78,6 +78,15 @@ test.group('release / releaseIdentity', () => {
     assert.equal(a.key, b.key)
   })
 
+  test('capitals and digits switching all over a token are random', async ({ assert }) => {
+    const { looksRandom } = await import('#lib/release/index')
+    assert.isTrue(looksRandom('51294P1CUKR2R35X'))
+    assert.isTrue(looksRandom('51294P1CUKR2R35X.part01.rar'.replace(/\.part01\.rar$/, '')))
+    assert.isFalse(looksRandom('COD4MW2REMASTERED'))
+    assert.isFalse(looksRandom('BEATLES1964REMASTER'))
+    assert.isFalse(looksRandom('HDTV1080P'))
+  })
+
   test('random extensionless names cannot be grouped by name', ({ assert }) => {
     const name = '204b914a977e5f891590ff1099c7a8caf1a0be537bfa5bf7f3a8b1213231'
     assert.isNull(releaseIdentity({ poster: 'x', subject: `"${name}" yEnc`, name, weak: true }))