fix(ci): green the test suite — pnpm 10 build scripts, libsodium ESM, stale time fixtures

CI has been red since the pnpm 10 migration. Four independent causes:

- better-sqlite3: pnpm 10 blocks dependency build scripts by default, so the
  native binding was never compiled on CI. Allowlist it via
  onlyBuiltDependencies in pnpm-workspace.yaml.
- libsodium-wrappers-sumo 0.7.16: the published ESM wrapper does
  `import "./libsodium-sumo.mjs"` but the tarball does not ship that file
  (it lives in the libsodium-sumo package). Patch the import to the bare
  specifier; local runs only worked because of a hand-copied file in
  node_modules.
- tx-accept/claim [live] tests: the live path checks deadlines against
  Date.now(), and the fixed fixture timestamps expired in June. Freeze the
  clock inside the fixture windows with vi.useFakeTimers.
- CML set_exunits panic ("RuntimeError: unreachable"): with
  localUPLCEval: false the provider asks Ogmios for ex-units; the test mocks
  answered `{}`, so the provider fell back to a spend redeemer at index 0
  while the escrow input sorts to index 1 — CML panics on the unknown
  redeemer key. Mock evaluateTransaction with the true index like real
  Ogmios.

Also regenerate the advert-datum golden: the fixture builders passed plain JS
numbers to cbor-x (minimal ints, float64 for the timestamp) while the
production codec — whose output is live on mainnet — emits full-width uint64.
Builders now encode integer fields as BigInt so builders, codec, and golden
agree byte-for-byte.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pnpm-lock.yaml

@@ -4,6 +4,11 @@ settings:
   autoInstallPeers: true
   excludeLinksFromLockfile: false
 
+patchedDependencies:
+  libsodium-wrappers-sumo@0.7.16:
+    hash: 761a204004f889b65fdf148159f4bd90733703d63a0ff00eb0671c92ea085096
+    path: patches/libsodium-wrappers-sumo@0.7.16.patch
+
 importers:
 
   .:
@@ -3166,7 +3171,7 @@ snapshots:
       '@cardano-sdk/util': 0.16.0
       blake2b: 2.1.4
       i: 0.3.7
-      libsodium-wrappers-sumo: 0.7.16
+      libsodium-wrappers-sumo: 0.7.16(patch_hash=761a204004f889b65fdf148159f4bd90733703d63a0ff00eb0671c92ea085096)
       lodash: 4.18.1
       npm: 9.9.4
       pbkdf2: 3.1.5
@@ -4743,7 +4748,7 @@ snapshots:
 
   libsodium-sumo@0.7.16: {}
 
-  libsodium-wrappers-sumo@0.7.16:
+  libsodium-wrappers-sumo@0.7.16(patch_hash=761a204004f889b65fdf148159f4bd90733703d63a0ff00eb0671c92ea085096):
     dependencies:
       libsodium-sumo: 0.7.16