fix(m190): r1 复审——0x01 修成 \1 + YAML 门禁、被调方声明 secret、拆两个超限测试文件、验签换 ed25519-dalek

四条 P1 + 四条 P2 一并处置（不变的是判据，变的是「谁在承重」）。

P1-1 `.github/workflows/release-build.yml` 的 sed 替换串是裸 0x01（本意 `\1`）：GitHub 解析该文件会
失败 ⇒ 整个 run 起不来；即便容忍，版本号也会被求值成单字节，PE 判据报「与 Cargo.toml 不同源？」把
排障引向错方向。修成字面 `\1`，并新增 `packaging/check_workflows_yaml.py`（真 YAML 解析器 parse
全部 workflow + 裸 C0 控制字符字节判据；带 --self-test 注入 0x01/坏结构断言必红），接进
`release-guard.yml` 两步。文本扫描型守卫看不见这类字节，这道门禁专门挡它。

P1-2 `release-publish.yml` 没在 `on.workflow_call.secrets` 里声明 `ULL_MANIFEST_SIGNING_KEY`，调用方
却传了：可复用工作流只拿得到自己声明过的 secret ⇒ 用户配好钥也会在签名步红，而错误文案反过来指控
Secret 没配。补声明（required: false，fail-closed 由步内 ::error:: + exit 1 承担，同
ULL_MSA_CLIENT_ID 的模式）。

P1-3 两个测试支撑文件越过 400 行守卫：签名夹具拆到 `tests/support_sign.rs`（support.rs 458→392），
CLI e2e 的签名部分拆到 `support/update_e2e_sign.rs`（update_e2e.rs 406→348）。纯搬家。

P2-2 「唯一收口点」改成结构事实：从 `UpdateSource` 删掉 `fetch_manifest` 默认实现，调用方只能拿
`verified_manifest(&source, channel)`（源只交原文，想绕过验签就得自己重写解析与渠道判据）。
P2-3 文档写的第 ④ 条命令补进流水线：`sign_manifest.py --verify-pinned` 用 trust.rs 里钉住的公钥
回验刚落盘的 .sig（不碰私钥），发布侧因此验证的是「客户端的判据」而不是「签名脚本的自我声明」。
P2-4 随自写实现一起删除（`Fe` 的错误 PartialEq 不再存在）。
P2-5 app-iced/build.rs 注释里那个 windows_subsystem 属性本分支不存在（M196 才有），改为说明
「本文件只写版本资源，子系统由 rustc 属性决定，check_pe_version.py 会把 subsystem 打出来」。
P2-6 坏清单不再带 error.path 是有意降级（来源 id 在 message 里），保持。

裁定项：自写 Ed25519 换成 `ed25519-dalek::verify_strict`（信任锚不许自写密码学；此刻信任表还是空表，
零兼容负担）。删除 `update/ed25519/{field,group,mod}.rs`（含只服务它们的单测），新 `update/ed25519.rs`
只剩一个薄封装；拒绝类用例（可锻 S+L / 小阶公钥 / 非规范 R / 空签名 / 未知 key）**一条没删**，
改成钉 dalek 的 strict 语义——实测 dalek 对全部五类的结论与旧实现一致（非规范 R 的拒绝理由不同：
dalek 走「小阶点」而非「编码非规范」，用例注释里写明）。签名侧留在 `packaging/ed25519_ref.py`
（纯 Python、零 pip 依赖），`--self-test` 用 RFC 8032 同一组向量钉两边。

Cargo.lock

@@ -368,6 +368,12 @@ version = "0.23.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac07cdecf99051d9a5238b80f35af32cdeba5b336e55d957b318b50137e18da5"
 
+[[package]]
+name = "base64ct"
+version = "1.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -660,6 +666,12 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "const-oid"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
+
 [[package]]
 name = "convert_case"
 version = "0.11.0"
@@ -846,6 +858,33 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f27ae1dd37df86211c42e150270f82743308803d90a6f6e6651cd730d5e1732f"
 
+[[package]]
+name = "curve25519-dalek"
+version = "4.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.2.17",
+ "curve25519-dalek-derive",
+ "digest",
+ "fiat-crypto",
+ "rustc_version",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "curve25519-dalek-derive"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "darling"
 version = "0.24.1"
@@ -892,6 +931,16 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "be1e0bca6c3637f992fc1cc7cbc52a78c1ef6db076dbf1059c4323d6a2048376"
 
+[[package]]
+name = "der"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c1832837b905bbfb5101e07cc24c8deddf52f93225eee6ead5f4d63d53ddcb"
+dependencies = [
+ "const-oid",
+ "zeroize",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -977,6 +1026,30 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
 
+[[package]]
+name = "ed25519"
+version = "2.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "115531babc129696a58c64a4fef0a8bf9e9698629fb97e9e40767d235cfbcd53"
+dependencies = [
+ "pkcs8",
+ "signature",
+]
+
+[[package]]
+name = "ed25519-dalek"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70e796c081cee67dc755e1a36a0a172b897fab85fc3f6bc48307991f64e4eca9"
+dependencies = [
+ "curve25519-dalek",
+ "ed25519",
+ "serde",
+ "sha2",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.42"
@@ -1094,6 +1167,12 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "fiat-crypto"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
+
 [[package]]
 name = "filetime"
 version = "0.2.29"
@@ -3087,6 +3166,16 @@ dependencies = [
  "futures-io",
 ]
 
+[[package]]
+name = "pkcs8"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f950b2377845cebe5cf8b5165cb3cc1a5e0fa5cfa3e1f7f55707d8fd82e0a7b7"
+dependencies = [
+ "der",
+ "spki",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.34"
@@ -3332,6 +3421,15 @@ dependencies = [
  "rand_core 0.9.5",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom 0.2.17",
+]
+
 [[package]]
 name = "rand_core"
 version = "0.9.5"
@@ -4197,6 +4295,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "signature"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77549399552de45a898a580c1b41d445bf730df867cc44e6c0233bbc4b8329de"
+dependencies = [
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "simd-adler32"
 version = "0.3.10"
@@ -4397,6 +4504,16 @@ dependencies = [
  "bitflags 2.13.2",
 ]
 
+[[package]]
+name = "spki"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d91ed6c858b01f942cd56b37a94b3e0a1798290327d1236e4d9cf4eaca44d29d"
+dependencies = [
+ "base64ct",
+ "der",
+]
+
 [[package]]
 name = "sse-stream"
 version = "0.2.6"
@@ -5056,6 +5173,7 @@ dependencies = [
 name = "unlucky-core"
 version = "0.2.3"
 dependencies = [
+ "ed25519-dalek",
  "flate2",
  "futures-util",
  "md-5",