feat: native linux-x64-glibc module packages and reviewed license supplements (ADR 0049, ADR 0052)

Implements ADR 0049's deferred native target and ADR 0052's reviewed
license supplements. The proof case is a real module using sharp.
packageFormat stays 1, and `any` is unchanged.

Packager (@ekklesia/module-pack):
- --target linux-x64-glibc. Native or platform-specific packages, found by
  the same generic rule that refuses them in `any`, stay outside the bundle.
- Each native package's production closure is walked through its own
  dependencies, installed optionalDependencies that match the target, and
  required peers. It is copied as real files flat under node_modules/<name>,
  with no links, dev dependencies, declarations, source maps, or other
  platforms' packages. Missing or foreign-platform required dependencies,
  version conflicts, links, foreign machines, and Node.js range conflicts
  fail closed.
- runtime.nodeApi, nodeAbi, and libcVersion are read from the binaries by a
  small ELF reader: the addon's node_api_module_get_api_version_v1 and the
  newest GLIBC_ symbol version needed. No shelling out. A native target with
  no addon is refused.
- ADR 0052 supplements: package-provided material stays primary. An exact
  match on name, version, and ekklesia-content-v1 digest (sorted normalized
  paths with each file's size and SHA-256; no metadata) adds labelled
  material after the package's own. Any mismatch, a declared-licence
  conflict, or a malformed or unreviewed supplement file fails. Missing
  material with no supplement still fails.

Supplement for @img/[email protected]:
- 184 components and 143 unique texts, assembled from the exact upstream
  sources sharp-libvips v1.3.3 builds linux-x64 from: 27 C/C++ libraries,
  glib's gvdb, librsvg's Rust crates (reproduced with cargo tree), the Rust
  standard library at the rustc commit recorded in the binary, plus the
  LGPL-3.0, GPL-3.0, and MPL-2.0 texts. Each source is recorded with its
  SHA-256 in PROVENANCE.md.
- It pins digest ekklesia-content-v1:sha256:50647b0b…, which is identical
  from the installed copy and from the registry tarball.
- LGPL/MPL source-availability determinations stay open, as ADR 0052
  states. Nothing claims they are met.

Verifier (Core):
- linux-x64-glibc is accepted only on a host whose platform, arch, glibc
  family and version, and Node-API version (from Node itself) match.
- Every ELF file must be x86-64; every .node must be an ELF object.
- `any` packages now also refuse node_modules/ and ELF files.
- Contract: native metadata must state nodeApi or nodeAbi, and Linux targets
  libcVersion (ADR 0049).

Proof:
- A checked-in AGPL native fixture packs byte-identically from unrelated
  copies (8.86 MB) and verifies with Core's verifier.
- Extracted elsewhere, it runs a sharp resize and PNG round trip in an
  empty-environment process. Every resolution stays in the package, and
  only the package's addon and libvips plus host system libraries load.

Signage is untouched.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/architecture/platform-architecture.md

@@ -683,11 +683,25 @@ Module Package v1, a deterministic `.tar.gz` with its SHA-256.
   third parties, and writes the archive. The source module's string SPDX expression is required and
   becomes the package metadata's authoritative `license`; the packager neither infers nor downloads
   license material.
+  - **Native target (`linux-x64-glibc`).** Native or platform-specific dependencies stay outside
+    the bundle. Each one is copied with exactly its production runtime closure, as real files flat
+    under the package's `node_modules/`, and only the platform packages that match the target are
+    included. The package's `runtime` records the Node-API version and minimum glibc version, both
+    read from the native binaries themselves.
+  - **License supplements.** Where a redistributed dependency omits required licence material,
+    reviewed supplements checked in with the packager add it
+    ([ADR 0052](decisions/0052-reviewed-license-supplements.md)). Each supplement matches one exact
+    package name, version, and content digest; anything else fails closed.
 - **The verifier.** Core's `verifyModulePackage` reads the archive in memory and refuses links,
   special files, and escaping paths. It checks every digest and identity, the target and runtime,
   runs the platform's own module, schema, and migration validation, and loads the backend once in a
   short-lived process with an empty environment. Only then does it extract anything.
-- **What exists today.** Only the `any` target. A manifest-v8 ABI module carries no
+  - **A native package's host checks.** It is accepted only on a host whose operating system, CPU,
+    C library family and version, and Node-API version Node.js itself reports as compatible.
+  - **ELF files.** Every ELF file in it must be built for the target's machine.
+  - **What an `any` package may not hold:** `node_modules`, addons, and ELF files.
+- **What exists today.** The `any` and `linux-x64-glibc` targets. No other operating system or CPU
+  target exists yet. A manifest-v8 ABI module carries no
   `transitional.databaseRuntime`; Drizzle may be bundled as its private implementation detail, and
   Core validates plain schema metadata without comparing ORM versions. A version 8 module that
   omits `database` remains on the temporary legacy facade and keeps ADR 0049's exact transitional