v1.10.0: MMUR2 signed claims (claims feature), DiscoveryRecord/EnrichPatch carry claims, meta-core writes post signed claims

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "meta-feeder-sdk"
-version = "1.9.0"
+version = "1.10.0"
 edition = "2021"
 rust-version = "1.85"
 license = "MIT"
@@ -37,7 +37,7 @@ default = ["feeder"]
 # FeederPlugin trait, hashing, the redb cache, the axum harness. On by default
 # so existing consumers build exactly what they always did.
 feeder = [
-    "beacon", "filename",
+    "beacon", "filename", "claims",
     "dep:axum", "dep:hyper", "dep:reqwest", "dep:base64", "dep:futures",
     "dep:async-trait", "dep:anyhow", "dep:thiserror", "dep:sha2", "dep:bytes",
     "dep:redb",
@@ -56,6 +56,15 @@ beacon = ["dep:libc"]
 transport = ["feeder", "dep:cid", "dep:tokio-util"]
 # Conformance checks any transport implementation must pass.
 testkit = ["transport"]
+# MMUR2 signed claims (`src/claims.rs`): the `SignedClaim` type, its canonical
+# bytes, signing (k256, compact low-S), verification and the writer key
+# (`METAMESH_SIGNING_KEY` / `_FILE`). `feeder` enables it because the gateway
+# wire (`DiscoveryRecord`, `EnrichPatch`) carries claims; a meta-* service that
+# only needs claims takes `default-features = false, features = ["claims"]`.
+claims = [
+    "dep:k256", "dep:bs58", "dep:sha2", "dep:base64", "dep:rand_core",
+    "dep:anyhow", "dep:thiserror",
+]
 
 [dependencies]
 # Async runtime + HTTP server (the serve_feeders harness)
@@ -80,6 +89,11 @@ bytes = { version = "1", optional = true }
 # Title-tag parsing (shared filename_meta — season/episode/quality/codec/languages).
 regex = { version = "1", optional = true }
 
+# MMUR2 claims (the `claims` feature).
+k256 = { version = "0.13", features = ["ecdsa", "std"], optional = true }
+bs58 = { version = "0.5", optional = true }
+rand_core = { version = "0.6", features = ["getrandom"], optional = true }
+
 # Per-plugin midhash/blob cache. Schema is identical to meta-share v1 — see
 # cache.rs. Pure-Rust single-process embedded store.
 redb = { version = "2", optional = true }