Vault OIDC login via Authentik: hostAlias + blueprint config

Vault's OIDC auth method needs to resolve auth.kube.huskypup.net (the
issuer URL) from inside its own pod - no in-cluster DNS entry exists for
that public hostname, so add a hostAlias pointing at the live
istio-ingressgateway LoadBalancer IP (verified current: 172.28.101.244).

authentik-blueprints-vault (vault-blueprint.yaml) was already applied to
the cluster and referenced by the authentik Deployment for some time -
committing it now so git matches the live, working state instead of
leaving it as an untracked local file.

infrastructure/authentik/vault-blueprint.yaml

@@ -0,0 +1,51 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: authentik-blueprints-vault
+  namespace: authentik
+  labels:
+    goauthentik.io/blueprint: "true"
+data:
+  vault.yaml: |-
+    version: 1
+    metadata:
+      name: vault-oidc
+    entries:
+      - model: authentik_providers_oauth2.oauth2provider
+        id: vault-provider
+        state: present
+        identifiers:
+          name: Vault
+        attrs:
+          name: Vault
+          client_id: 9816a5ae7e7914b5d18f4ab939d011a98f8c8d6b3bb6777c46431afa06ac4a85
+          client_secret: ed2ba1c6378c7a46341b5162f39a7fab80e37596b01ed387c3719e8e0040344cf1daa307476c2e7a7f75041b3979275b1ebf00bb8bad94c864b4a38ded544f7b
+          authorization_flow: !Find [authentik_flows.flow, [slug, default-provider-authorization-implicit-consent]]
+          authentication_flow: !Find [authentik_flows.flow, [slug, default-authentication-flow]]
+          invalidation_flow: !Find [authentik_flows.flow, [slug, default-provider-invalidation-flow]]
+          redirect_uris:
+            - url: "https://vault.kube.huskypup.net/ui/vault/auth/oidc/oidc/callback"
+              matching_mode: strict
+            - url: "http://localhost:8250/oidc/callback"
+              matching_mode: strict
+          property_mappings:
+            - !Find [authentik_providers_oauth2.scopemapping, [scope_name, openid]]
+            - !Find [authentik_providers_oauth2.scopemapping, [scope_name, email]]
+            - !Find [authentik_providers_oauth2.scopemapping, [scope_name, profile]]
+          client_type: confidential
+          access_code_validity: "minutes=10"
+          access_token_validity: "hours=1"
+          refresh_token_validity: "days=30"
+          signing_key: !Find [authentik_crypto.certificatekeypair, [name, "authentik Internal JWT Certificate"]]
+
+      - model: authentik_core.application
+        id: vault-application
+        state: present
+        identifiers:
+          slug: vault
+        attrs:
+          name: Vault
+          slug: vault
+          policy_engine_mode: any
+          provider: !KeyOf vault-provider