feat(portfolio): complete RESOURCE-WP-0003 T06 optimization cases and T07 reporting

T06: optimization-case schema, fail-closed evaluator, cadence and decision
template. Every option including the baseline must present all ten decision
fields; one unknown blocks the comparison. Validated on the storage case
(Hetzner computes and loses to Scaleway by EUR 29.14/month on operator labour;
Host Europe blocks on four named gaps) and on the non-storage reef-railiance
k3s rightsizing case (low utilization is real, but nothing is costable while
the railiance01 price is unknown).

T07: portfolio report over coverage, lifecycle, utilization, cost, renewals,
risks, open cases, and next actions, derived only from committed evidence.
Portfolio spend is reported null rather than as a partial sum, unattributed
cost is a named list rather than a spread, and unmeasurable resources are
reported rather than dropped.

RESOURCE-WP-0003 is finished; both cases remain blocked_on_evidence against
live delegated records in other repositories. RESOURCE-WP-0002 is untouched.

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

data/resources/platform-audit-storage.proposed.json

@@ -0,0 +1,67 @@
+{
+  "schema_version": "0.2",
+  "record_scope": "inventory",
+  "id": "resource:platform:audit-storage",
+  "resource_class": "storage",
+  "status": "proposed",
+  "management_model": "provider_managed",
+  "provider": {
+    "name": "Scaleway",
+    "account_ref": null,
+    "product_ref": "scaleway-standard-multi-az",
+    "provider_resource_id": null
+  },
+  "service": {
+    "name": "platform audit storage",
+    "service_id": "object-storage",
+    "class": "Standard Multi-AZ object storage",
+    "capacity_model": "elastic"
+  },
+  "location": {
+    "region": "nl-ams",
+    "country": "NL",
+    "failure_domains": ["provider:scaleway", "region:nl-ams"],
+    "residency": "European Union"
+  },
+  "capacity": [
+    {"metric": "stored_data", "value": null, "unit": "GB", "kind": "unknown", "observed_at": null}
+  ],
+  "ownership": {
+    "owner": "resource-control",
+    "environment": "production",
+    "workload_ids": ["rapp-postgres/platform-pg"],
+    "tenant_id": null,
+    "allocation": {
+      "mode": "dedicated",
+      "cost_attribution_key": "platform:audit-storage",
+      "driver": "direct-resource",
+      "method_version": "direct-v1"
+    }
+  },
+  "cost": {
+    "currency": "EUR",
+    "tax_status": "excluded",
+    "billing_model": "usage-based storage and egress; no commitment",
+    "commitment_ref": null,
+    "price_evidence": "data/providers/object-storage.json#scaleway-standard-multi-az"
+  },
+  "lifecycle": {
+    "proposed_on": "2026-08-10",
+    "ordered_on": null,
+    "commissioned_on": null,
+    "renews_on": null,
+    "cancel_by": null,
+    "retired_on": null,
+    "exit_path": "Copy and verify all Barman objects in an independent S3-compatible target, run full and PITR restore, revoke the scoped key, then delete source objects and bucket after evidence is durable."
+  },
+  "relationships": [],
+  "requirements": [
+    {"kind": "recovery", "ref": "workplans/RESOURCE-WP-0002-procure-postgres-backup-storage.md#acceptance-requirements"},
+    {"kind": "retention", "ref": "data/demand/platform-audit-storage.json"}
+  ],
+  "evidence": [
+    {"kind": "provider", "ref": "https://www.scaleway.com/en/pricing/storage/", "observed_at": "2026-08-10", "authority": "Scaleway"},
+    {"kind": "provider", "ref": "https://www.scaleway.com/en/object-storage/", "observed_at": "2026-08-10", "authority": "Scaleway"},
+    {"kind": "decision", "ref": "docs/evidence/RESOURCE-WP-0002-provider-due-diligence-2026-08-10.md", "observed_at": "2026-08-10", "authority": "resource-control"}
+  ]
+}