fix: resolve critical deployment issues across Helm charts, Dockerfile, and K8s fallback

- Add helm/kubectl binaries and chart directory to backend Dockerfile
- Extend Helm templates for MongoDB/MariaDB database support (env vars, probes, ports)
- Add Redis and RabbitMQ Helm templates (deployment, service, secret, PVC)
- Add generic app-storage PVC and Fluent Bit sidecar with ES authentication
- Fix imagePullSecrets in K8s API fallback, prevent secret regeneration on redeploy
- Clean up Redis/RabbitMQ/FluentBit resources on app deletion without removing shared secrets
- Fix HelmService chartPath resolution for production Docker builds

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/helm/cloudhost-app/templates/fluent-bit-configmap.yaml

@@ -0,0 +1,71 @@
+{{- if .Values.elasticsearch.enabled }}
+{{- $name := include "cloudhost-app.name" . -}}
+{{- $ns   := include "cloudhost-app.namespace" . -}}
+{{- $logPaths := .Values.elasticsearch.logPaths -}}
+{{- $defaultPaths := include "cloudhost-app.defaultLogPaths" . | trim -}}
+{{- $paths := ternary ($logPaths | join ",") $defaultPaths (and $logPaths (gt (len $logPaths) 0)) -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ $name }}-fluent-bit-config
+  namespace: {{ $ns }}
+  labels:
+    {{- include "cloudhost-app.labels" . | nindent 4 }}
+data:
+  fluent-bit.conf: |
+    [SERVICE]
+        Flush         5
+        Daemon        Off
+        Log_Level     info
+        Parsers_File  /fluent-bit/etc/parsers.conf
+
+    [INPUT]
+        Name          tail
+        Path          {{ $paths }}
+        Tag           app.{{ $name }}
+        Refresh_Interval 5
+        Mem_Buf_Limit 5MB
+        Skip_Long_Lines On
+
+    [FILTER]
+        Name          record_modifier
+        Match         *
+        Record        app {{ $name }}
+        Record        namespace {{ $ns }}
+        Record        runtime {{ .Values.app.runtime }}
+
+    [FILTER]
+        Name          parser
+        Match         *
+        Key_Name      log
+        Parser        json
+        Reserve_Data  On
+        Preserve_Key  On
+
+    [OUTPUT]
+        Name          es
+        Match         *
+        Host          ${ES_HOST}
+        Port          ${ES_PORT}
+        HTTP_User     elastic
+        HTTP_Passwd   ${ES_PASSWORD}
+        Index         logs-{{ $ns }}-{{ $name }}
+        Logstash_Format On
+        Logstash_Prefix logs-{{ $ns }}
+        Suppress_Type_Name On
+        tls           Off
+        Retry_Limit   3
+
+  parsers.conf: |
+    [PARSER]
+        Name        json
+        Format      json
+        Time_Key    time
+        Time_Format %Y-%m-%dT%H:%M:%S.%L
+
+    [PARSER]
+        Name        docker
+        Format      json
+        Time_Key    time
+        Time_Format %Y-%m-%dT%H:%M:%S.%L
+{{- end }}