feat: add memory service queues (processing, indexing, dlq)

- processing-queue: high-throughput, auto-scaling (1-4 shards)
- indexing-queue: FIFO with deduplication (1-2 shards)
- memory-dlq: dead letter queue for redelivery failures
- ArgoCD Application (wave 7) to auto-sync queue lifecycle

k8s/apps/messaging/memory-queues/dlq.yaml

@@ -0,0 +1,13 @@
+apiVersion: kmsvc.io/v1
+kind: Queue
+metadata:
+  name: memory-dlq
+  namespace: sqs
+spec:
+  isDLQ: true
+  visibilityTimeoutSeconds: 300
+  messageRetentionPeriodSeconds: 1209600  # 14 days
+  maxReceiveCount: 1  # DLQ itself shouldn't retry
+  partitionsPerShard: 1
+  minShards: 1
+  maxShards: 1

k8s/apps/messaging/memory-queues/indexing-queue.yaml

@@ -0,0 +1,14 @@
+apiVersion: kmsvc.io/v1
+kind: Queue
+metadata:
+  name: memory-indexing
+  namespace: sqs
+spec:
+  fifoQueue: true
+  visibilityTimeoutSeconds: 60
+  messageRetentionPeriodSeconds: 2592000  # 30 days
+  maxReceiveCount: 5
+  partitionsPerShard: 1
+  minShards: 1
+  maxShards: 2
+  delaySeconds: 0

k8s/apps/messaging/memory-queues/kustomization.yaml

@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: sqs
+
+resources:
+  - processing-queue.yaml
+  - indexing-queue.yaml
+  - dlq.yaml

k8s/apps/messaging/memory-queues/processing-queue.yaml

@@ -0,0 +1,15 @@
+apiVersion: kmsvc.io/v1
+kind: Queue
+metadata:
+  name: memory-processing
+  namespace: sqs
+spec:
+  fifoQueue: false
+  visibilityTimeoutSeconds: 120
+  messageRetentionPeriodSeconds: 604800  # 7 days
+  maxReceiveCount: 3
+  deadLetterTargetQueue: memory-dlq
+  partitionsPerShard: 3
+  minShards: 1
+  maxShards: 4
+  shardSplitThresholdBytesPerSec: 5242880

k8s/argocd/apps/50-memory-queues.yaml

@@ -0,0 +1,20 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: memory-queues
+  namespace: argocd
+  annotations:
+    argocd.argoproj.io/sync-wave: "7"
+spec:
+  project: homelab
+  source:
+    repoURL: https://forgejo.riotpiao.com/rock/homelab.git
+    targetRevision: main
+    path: k8s/apps/messaging/memory-queues
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: sqs
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true