fix: extract auth config to ConfigMap + SOPS, update Authentik slug (#40)

## Problem

JWT validation failing with `error decoding response body: expected value at line 6 column 1`.

Root cause: `AUTHENTIK_ISSUER` pointed to slug `poimen-memory` which returns 404 on OIDC discovery. Slug was renamed to `poimen` in Authentik.

Secondary issue: auth env vars were set via `kubectl set env` (not in git), so every ArgoCD sync reverted them.

## Changes

- **k8s/app/config.yaml** — ConfigMap for non-sensitive env (auth mode, rate limits, OpenSearch/Obsidian URLs)
- **k8s/app/auth.enc.yaml** — SOPS-encrypted Secret with `AUTHENTIK_ISSUER`, `AUTHENTIK_AUDIENCE`, `JWT_CACHE_TTL_SECS`
- **k8s/app/secret-generator.yaml** — KSOPS generator for ArgoCD decryption
- **k8s/app/deployment.yaml** — `envFrom` referencing ConfigMap + Secret
- **k8s/app/kustomization.yaml** — Added config.yaml + KSOPS generator
- **k8s/app/opensearch-deployment.yaml** — Updated JWKS/issuer URLs to `poimen` slug

## Rollout

Reloader (`--auto-reload-all=true`) triggers rolling restart when ConfigMap/Secret change. Merge and ArgoCD sync handles everything.Reviewed-on: rock/poimen-memory#40

Co-authored-by: rock <[email protected]>

k8s/app/auth.enc.yaml

@@ -0,0 +1,28 @@
+apiVersion: ENC[AES256_GCM,data:TZY=,iv:sKXTsB2VO5ZAL6s/xzqcIgwtlNqk0xxOclb6ErYz02Q=,tag:yfK6Ax8mHaYZQVImcrsLcA==,type:str]
+kind: ENC[AES256_GCM,data:Xr4rR7y/,iv:edAtbejU0PElYRZyAntlyuj5WnGf+Eksr+c636ovMc8=,tag:Hwv1higF27NzOTk/8EawYw==,type:str]
+metadata:
+    name: ENC[AES256_GCM,data:Oe7W0UZxilfIUCIJRM4xP2sR,iv:w1NOlc20m8NX/WRT4JhXZ1MWjY0sFQa8ZJDeXemrL2M=,tag:cJ5TV8nKYHQhtLEnQa2mwQ==,type:str]
+    namespace: ENC[AES256_GCM,data:+4jnzJeY,iv:nfooi5BOr9Exx8r5m00HJRSnFYiSofV9/+heWjJNmww=,tag:TYoi+OJK6+1oe8SpyGeEEg==,type:str]
+    labels:
+        app.kubernetes.io/name: ENC[AES256_GCM,data:gxlL3o3C3mA9Th9OaQ==,iv:Hw4a9d9xAnX9MOdFkj3jf524I6wgBwPfoVYmXKUQgtU=,tag:9lTd7W1kx/Uv9E0MVMnclA==,type:str]
+        app.kubernetes.io/component: ENC[AES256_GCM,data:4DePKA==,iv:6f1Pvu+vWI+VkF8YrlSAM7yMvSckHWk+lu3qeMAz/ew=,tag:krszM09nNTo0EMtLJGw6Ew==,type:str]
+type: ENC[AES256_GCM,data:Ri5WKSXq,iv:D1APSbaBiSL1FQS3eKQ2Jbl+BZ2EgKjIbpjh4TjRntU=,tag:rdCSkAFBkGn5qCmEZh6KxQ==,type:str]
+stringData:
+    AUTHENTIK_ISSUER: ENC[AES256_GCM,data:LpLo+01McEw9gNwRqq06GgNXxi40QjmGXWKQfPBEw3rJ2vBaNyAbQv82vsFMdnrwUyTEulPsVvWHO9IS6fGip224UA==,iv:EUME2lcjH103kRgfktAnABT+HA5ckJ8FG/N8x/qKv5M=,tag:GhVZYiEFw8tSRUz/hxTROQ==,type:str]
+    AUTHENTIK_AUDIENCE: ENC[AES256_GCM,data:vhI7n2TG,iv:Q2E3aE6dx6BMqGHBNrEpUFwdEecmP/ZetkOmx5b4RB8=,tag:y+Wj9riWxFbOV+C04CGoJQ==,type:str]
+    JWT_CACHE_TTL_SECS: ENC[AES256_GCM,data:8ckJPw==,iv:/OL2ke9KSeUZHC2+wtqh7oNoU0YYlkxtbsXhjiCxLsk=,tag:LzPFyzFCXoaLs892/OKHCQ==,type:str]
+sops:
+    age:
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBlSDFVZWdWZ0tVREV1UWVI
+            YVJ5eVVZdGcwSzdjREkzbkFLTmpWZi9mRnc0CkJ2Ujh4ZWVLMjFUczIzVmYwWEo4
+            eGpwZStvY1BYU1FHWEZDV1FhTE4zdWsKLS0tIDRJYmI5UzFVVFRCcCtUM1hYc3d3
+            S29NczhTb044SzlVWVBlN2paL0hzSEEKo/Q48c7IxhII1QJIwNDgUp7fSnbe2KOa
+            cnRlDnfN/6+6xTePnu+4uhmCJqHKprdpH/2RPrj51k4psgiOZdBi7w==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
+    lastmodified: "2026-09-08T05:17:56Z"
+    mac: ENC[AES256_GCM,data:ug9mPSxKAr2ZAci0S2DeYRrmaeQJLeC9N4B6fVRjy+pSaul2tfa9v6trTgrCnEI+VCqQMcDtlUQmrBy6CHoxlcHn8inHXMj+56mVAmxv0riHiyQOwtiZGVm1xX5kKA/z2q9tyT13aSPcsoVeuX6BOuwNjHCdAegsSEbZhuzrP4c=,iv:b2XdpqSeZAwNmbtSMwysHlsfPUJJCAN8qScWEj/JF9c=,tag:d2R/sQCFzB7+P2GUJGnHCg==,type:str]
+    unencrypted_suffix: _unencrypted
+    version: 3.13.2

k8s/app/config.yaml

@@ -0,0 +1,23 @@
+# Non-sensitive environment variables for poimen-memory
+# Change these without redeploying secrets.
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: poimen-memory-config
+  namespace: poimen
+  labels:
+    app.kubernetes.io/name: poimen-memory
+    app.kubernetes.io/component: config
+data:
+  # Auth mode: jwt | apikey
+  MEM_AUTH_MODE: "jwt"
+  # Rate limiting
+  MEM_RATE_LIMIT_INGEST: "100"
+  MEM_RATE_LIMIT_QUERY: "1000"
+  MEM_IDEMPOTENCY_TTL_SECS: "86400"
+  # Embeddings
+  MEM_EMBEDDING_BATCH_SIZE: "32"
+  # OpenSearch
+  OPENSEARCH_HOST: "opensearch.poimen.svc.cluster.local:9200"
+  # Obsidian
+  OBSIDIAN_URL: "http://obsidian-server.poimen.svc.cluster.local:8080"

k8s/app/deployment.yaml

@@ -66,11 +66,16 @@ spec:
                 secretKeyRef:
                   name: poimen-memory-secrets
                   key: llm-api-key
-            # Server config
+            # Server config (from ConfigMap)
             - name: MEM_PORT
               value: "8080"
             - name: MEM_HOME
               value: "/tmp"
+          envFrom:
+            - configMapRef:
+                name: poimen-memory-config
+            - secretRef:
+                name: poimen-memory-auth
           args:
             - serve
             - --port

k8s/app/kustomization.yaml

@@ -5,6 +5,9 @@ resources:
   # vault-pvc.yaml removed — memory service uses pgvector, not local storage
   - deployment.yaml
   - service.yaml
+  - config.yaml
   - obsidian.yaml
-  # Secret managed separately (SealedSecret in homelab)
+  # Legacy secret managed separately
   # - secrets.yaml
+generators:
+  - secret-generator.yaml

k8s/app/opensearch-deployment.yaml

@@ -53,11 +53,11 @@ data:
                 subject_key: "sub"
                 
                 # JWKS endpoint from Authentik
-                jwks_uri: "https://authentik.riotpiao.com/application/o/poimen-memory/jwks/"
+                jwks_uri: "https://authentik.riotpiao.com/application/o/poimen/jwks/"
                 jwks_refresh_interval_ms: 3600000  # 1 hour
                 
                 # Issuer validation
-                issuer: "https://authentik.riotpiao.com/application/o/poimen-memory/"
+                issuer: "https://authentik.riotpiao.com/application/o/poimen/"
                 audience: null
                 
                 # Claims mapping

k8s/app/secret-generator.yaml

@@ -0,0 +1,11 @@
+# KSOPS generator — ArgoCD decrypts auth.enc.yaml at sync time
+apiVersion: viaduct.ai/v1
+kind: ksops
+metadata:
+  name: poimen-memory-auth-generator
+  annotations:
+    config.kubernetes.io/function: |
+      exec:
+        path: ksops
+files:
+  - auth.enc.yaml