```plaintext
%% Tiered Storage Strategy (ADR-0026)
%% C4 Component diagram showing Longhorn + NFS dual-tier

flowchart TB
    subgraph tier1["🚀 TIER 1: LONGHORN (Fast Distributed Block)"]
        direction TB
        
        subgraph nodes["Cluster Nodes"]
            direction LR
            khelben["🖥️ khelben<br/>/var/mnt/longhorn<br/>NVMe"]
            mystra["🖥️ mystra<br/>/var/mnt/longhorn<br/>SSD"]
            selune["🖥️ selune<br/>/var/mnt/longhorn<br/>SSD"]
        end

        longhorn_mgr["⚙️ Longhorn Manager<br/>(Schedules 2-3 replicas)"]

        subgraph longhorn_pvcs["Performance Workloads"]
            direction LR
            pg["🐘 PostgreSQL"]
            vault["🔐 Vault"]
            prom["📊 Prometheus"]
            click["📋 ClickHouse"]
        end
    end

    subgraph tier2["💾 TIER 2: NFS-SLOW (High-Capacity Bulk)"]
        direction TB
        
        nas["🗄️ candlekeep.lab.daviestechlabs.io<br/>External NAS<br/>/kubernetes"]
        
        nfs_csi["📂 NFS CSI Driver"]

        subgraph nfs_pvcs["Bulk Storage Workloads"]
            direction LR
            jellyfin["🎬 Jellyfin<br/>(1TB+ media)"]
            nextcloud["☁️ Nextcloud"]
            immich["📷 Immich"]
            kavita["📚 Kavita"]
            mlflow["📈 MLflow<br/>Artifacts"]
            ray_models["🤖 Ray<br/>Model Weights"]
        end
    end

    %% Tier 1 connections
    nodes --> longhorn_mgr
    longhorn_mgr --> longhorn_pvcs

    %% Tier 2 connections
    nas --> nfs_csi
    nfs_csi --> nfs_pvcs

    classDef tier1_node fill:#3498db,color:white
    classDef tier1_mgr fill:#2980b9,color:white
    classDef tier1_pvc fill:#1abc9c,color:white
    classDef tier2_nas fill:#e74c3c,color:white
    classDef tier2_csi fill:#c0392b,color:white
    classDef tier2_pvc fill:#f39c12,color:black

    class khelben,mystra,selune tier1_node
    class longhorn_mgr tier1_mgr
    class pg,vault,prom,click tier1_pvc
    class nas tier2_nas
    class nfs_csi tier2_csi
    class jellyfin,nextcloud,immich,kavita,mlflow,ray_models tier2_pvc

```