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>

edge/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "edge"
+version = "0.1.0"
+edition = "2021"
+description = "Voyager 2's edge worker (edge-node) and its benchmark (edge-bench): the RangeIndexer in Rust, kept identical to lib/edge (check.ts)"
+
+[[bin]]
+name = "edge-bench"
+path = "src/main.rs"
+
+[[bin]]
+name = "edge-node"
+path = "src/bin/edge-node.rs"
+
+[dependencies]
+base64 = "0.22"
+chrono = "0.4"
+flate2 = { version = "1", default-features = false, features = ["zlib-rs"] }
+libdeflater = "1.26.1"
+md-5 = "0.10"
+memchr = "2.8.3"
+mimalloc = "0.1.52"
+regex = "1"
+rustc-hash = "2"
+serde = { version = "1.0.229", features = ["derive"] }
+serde_json = "1.0.151"
+sha1 = "0.10"
+signal-hook = "0.4.5"
+ureq = "3.4.2"
+zstd = "0.13"
+
+[profile.release]
+lto = true
+codegen-units = 1