Add Vault access for forgebot service

K8s auth role binding for forgebot namespace (default + forgebot-operator
service accounts) and KV read policies for environment config, LiteLLM
API key, Gitea token, PostgreSQL credentials, and webhook secret.

config/auth_kubernetes_role/k8s/au/syd1/forgebot.yaml

@@ -0,0 +1,8 @@
+bound_service_account_names:
+  - default
+  - forgebot-operator
+bound_service_account_namespaces:
+  - forgebot
+token_ttl: 600
+token_max_ttl: 600
+audience: vault

policies/kv/service/forgebot/environment/read.yaml

@@ -0,0 +1,9 @@
+---
+rules:
+  - path: "kv/data/service/forgebot/environment"
+    capabilities:
+      - read
+
+auth:
+  k8s/au/syd1:
+    - forgebot

policies/kv/service/forgebot/gitea-token/read.yaml

@@ -0,0 +1,9 @@
+---
+rules:
+  - path: "kv/data/service/forgebot/gitea-token"
+    capabilities:
+      - read
+
+auth:
+  k8s/au/syd1:
+    - forgebot

policies/kv/service/forgebot/litellm-api-key/read.yaml

@@ -0,0 +1,9 @@
+---
+rules:
+  - path: "kv/data/service/forgebot/litellm-api-key"
+    capabilities:
+      - read
+
+auth:
+  k8s/au/syd1:
+    - forgebot

policies/kv/service/forgebot/postgres-credentials/read.yaml

@@ -0,0 +1,9 @@
+---
+rules:
+  - path: "kv/data/service/forgebot/postgres-credentials"
+    capabilities:
+      - read
+
+auth:
+  k8s/au/syd1:
+    - forgebot

policies/kv/service/forgebot/webhook-secret/read.yaml

@@ -0,0 +1,9 @@
+---
+rules:
+  - path: "kv/data/service/forgebot/webhook-secret"
+    capabilities:
+      - read
+
+auth:
+  k8s/au/syd1:
+    - forgebot