IAM Profile consumption doc + claim fixtures; close FLEX-WP-0005

Completes FLEX-WP-0005 T05 and closes the Foundations and Topaz
Alignment workstream.

docs/iam-profile-consumption.md captures flex-auth's input surface
against NetKingdom IAM Profile v0.1:
- boundary (flex-auth consumes verified claims; upstream layer
  validates signatures and audiences)
- normalized input envelope (matches Markitect's EnterpriseIdentity)
- required, recommended, and tolerated claim variations
- role-claim location union (top-level / realm_access / resource_access)
- scope encoding (string vs array)
- principal-type detection (human / service / emergency)
- group-overage and freshness expectations
- production vs local-development handling

examples/claims/ ships five contract fixtures:
- key-cape-lightweight.yaml (profile minimum)
- keycloak-heavy.yaml (full variation set + MFA)
- service-account.yaml (svc-* hub-to-hub)
- emergency.yaml (break-glass with incident metadata)
- keycloak-group-overage.yaml (Entra-style hasgroups: true)

All fixtures parse as valid YAML. They become contract tests for the
standalone evaluator (FLEX-WP-0002 P2.4) and the Topaz adapter
(FLEX-WP-0004 T01); both code paths must produce identical normalized
envelopes for the same fixture.

FLEX-WP-0005 workstream marked status=done in this file and completed
in the State Hub. FLEX-WP-0002 is now fully unblocked.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

examples/claims/key-cape-lightweight.yaml

@@ -0,0 +1,24 @@
+# Claim envelope a key-cape (lightweight mode) deployment emits for an
+# authenticated human user. Profile-conformant minimum: required claims
+# only, single audience, simple roles list, OIDC standard amr values.
+#
+# Reference: docs/iam-profile-consumption.md, NetKingdom IAM Profile v0.1
+# §"Required Claims" and §"Local Development Profile".
+
+iss: https://idp.netkingdom.local/keycape
+sub: user-7f9e2b
+aud:
+  - flex-auth
+exp: 4102444800  # 2100-01-01, kept far-future for stable fixtures
+iat: 1767225600  # 2026-01-01
+preferred_username: ada
+email: ada@netkingdom.local
+name: Ada Lovelace
+scope: openid profile hub:read
+roles:
+  - viewer
+amr:
+  - pwd
+acr: "1"
+groups:
+  - /markitect/readers