feat: Ekklesia Module Package v1, the canonical packager and verifier (ADR 0049)

A separately versioned module is now distributed as one deterministic
.tar.gz and its SHA-256, produced by an Ekklesia-owned packager and checked by
Core before anything is installed. This slice implements the portable `any`
target, with the module template as the end-to-end proof. ADR 0049 is
accepted.

@ekklesia/contracts: the Module Package v1 contract. The strict
ekklesia.package.json schema (packageFormat 1, identity, target, runtime,
provenance, incorporated Ekklesia packages, strict transitional facts, an
exact byte-wise-sorted file list with size and SHA-256), target names, and the
generated runtime package.json.

@ekklesia/module-pack (new, tooling): `ekklesia-pack-module --module <dir>
--target any --out <dir> --source-revision <commit>`.
- Bundles server, schema, and jobs with esbuild, SDK, contracts, and Drizzle
  included; only Node built-ins remain imports. Any warning, unresolved
  import, external dependency, or native or platform-specific package fails.
- Copies browser artifacts as built, after proving them current, and the
  migrations; generates package.json and ekklesia.package.json; never ships
  src, tests, declarations, source maps, or workspace ranges.
- THIRD_PARTY_NOTICES: every third-party package traced from the bundles'
  own inputs, credited once with its declared licence and every licence,
  copying, copyright, and notice file it ships. A missing licence fails; a
  missing text fails unless its standard text is complete without copyright
  lines (Apache-2.0, vendored, needed by drizzle-orm).
- Deterministic ustar and gzip: sorted paths, uid/gid 0, empty names, mtime
  0, 0755/0644, no links. Byte-identical across runs and machines.
- Writes only the archive and its .sha256; never deploys, links, or installs,
  so the workspace's install state is untouched.

Core: verifyModulePackage and `verify-module-package.js <archive>
[--sha256 | --sha256-file] [--extract-to <new dir>]`. Reads the archive in
memory and refuses links, special entries, setuid/setgid/sticky modes, unsafe
or escaping paths, and a second top-level directory; checks metadata, every
file, identity, target, Node.js range, SDK, and the transitional Drizzle
agreement; runs the platform's module and migration discovery; loads the
backend once in a forked process with an empty environment; only then
extracts, with normalized modes, into a new directory. Errors are sanitized.

@ekklesia/module-ui-build: analyzeModuleUi reports each artifact's inputs
and whether the built file is current. The nested stylesheet build now works
from the module directory, so artifacts no longer depend on the caller's
working directory.

The split deploy smoke builds the package with the canonical packager
(scripts/lib/build-module-package.Dockerfile replaces the test-only pnpm
deploy packaging), verifies it with the same generic image, installs the
verified tree, removes it, and reinstalls the exact same archive.

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

docs/architecture/decisions/0049-module-package-v1.md

@@ -1,6 +1,6 @@
 # 0049: A module release is one immutable, self-contained package: Ekklesia Module Package v1
 
-- Status: Proposed
+- Status: Accepted
 - Date: 2026-10-07
 - Supersedes: none
 - Extends: [0048](0048-generic-image-and-installed-module-storage.md)

docs/architecture/decisions/README.md

@@ -57,4 +57,4 @@ ADRs capture durable choices that affect more than one package or phase.
 - [0046: Ekklesia's branding is never forced on an installation](0046-installation-owned-branding.md) — Proposed
 - [0047: Every module proves itself inside Ekklesia, with one harness the platform publishes](0047-module-ci-harness.md) — Proposed
 - [0048: Ekklesia ships one generic image, and installed modules live outside it](0048-generic-image-and-installed-module-storage.md) — Accepted
-- [0049: A module release is one immutable, self-contained package: Ekklesia Module Package v1](0049-module-package-v1.md) — Proposed
+- [0049: A module release is one immutable, self-contained package: Ekklesia Module Package v1](0049-module-package-v1.md) — Accepted

docs/architecture/platform-architecture.md

@@ -672,3 +672,18 @@ artifact from what an installation installs:
   module that lost or changed an applied migration is still refused.
 - **Trust is unchanged.** Installed modules are still trusted code; module storage is mounted
   read-only, which keeps Ekklesia from modifying installed code but does not sandbox it.
+
+[ADR 0049](decisions/0049-module-package-v1.md) defines how a module is distributed: one Ekklesia
+Module Package v1, a deterministic `.tar.gz` with its SHA-256.
+
+- **The packager.** `@ekklesia/module-pack` bundles the module's backend with every pure-JavaScript
+  dependency, the SDK, contracts, and Drizzle included. It copies the built browser artifacts and
+  migrations, generates the runtime `package.json`, `ekklesia.package.json` with every file's digest,
+  and `THIRD_PARTY_NOTICES`, and writes the archive.
+- **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,
+  and the transitional Drizzle agreement, runs the platform's own module 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. Drizzle agreement is recorded as transitional, not a
+  database ABI.