chore: remove sample portfolio module

.github/scripts/verify-gate-matrix.sh

@@ -25,10 +25,11 @@ fi
 readonly REPO_ROOT
 readonly MATRIX="${REPO_ROOT}/.github/ci-gate-matrix.yml"
 # Deliberately a literal: a gate silently appearing or disappearing is the drift this lint exists to
-# catch, so growing the matrix is an explicit edit here. 38 as of the HTTP Client platform hardening,
+# catch, so growing the matrix is an explicit edit here. 37 after removing the sample-only Poster
+# migration gate; the HTTP Client platform hardening
 # which registered httpclient-spring62-runtime as a delegated-pending control — the 6.2 *runtime*
 # claim, distinct from the API-surface scan that was standing in for it.
-readonly EXPECTED_GATE_COUNT=38
+readonly EXPECTED_GATE_COUNT=37
 
 if [[ ! -f "${MATRIX}" ]]; then
   printf '::error::gate-matrix-lint: missing %s\n' "${MATRIX}" >&2

.github/scripts/verify-gradle-wrapper.sh

@@ -26,7 +26,7 @@ readonly EXPECTED_WORKFLOW_LOCK=(
   'ad84000efc438ee7439517b8f85819e62b13dab0aa4f94066c2905060f3bb581  .github/workflows/httpclient-release.yml'
   '59cb3a0ffc687a15eefe96bc5e3a70d42be78e1cc85d2e7f7880dac6124ca4c7  .github/workflows/jpa-r2-evidence.yml'
   '5be7e931db749029d89787da042d6d7cf8e683d60698bd8a2993c29db26355fb  .github/workflows/link-check.yml'
-  '64245586cd5936f1a5647b57f2cd9acd316f96fd75f713b1890decb812e7d5fe  .github/workflows/object-storage-qualification.yml'
+  '2f1c46cc8b7b39890e5debe90f78d19b9347ed53f499b282539dae88aefdd574  .github/workflows/object-storage-qualification.yml'
   'cbc104ea486c746229895e804e3be7716e056a02cce0588c537bce9f442f8b38  .github/workflows/redis-sdk-topology.yml'
 )
 readonly EXPECTED_WRAPPER_PROPERTIES=(