flowchart TD subgraph Source ["`**Observability Sources**`"] PG[(PostgreSQL)] A(Spring Boot App) ACT(Spring Actuator) end subgraph Edge ["`**Cloudflare Edge**`"] direction TB C(Cron Worker) D1[(D1 Metrics)] W(Fetch Worker) end subgraph UI ["`**Observability UI**`"] MON(Live Dashboard) end PG <--> A A -- "Business Metrics" --> C ACT -- "System Health" --> C C -- "30m Snapshot" --> D1 D1 --> W W --> MON style A fill:#475569,stroke:#334155,stroke-width:2px,color:#ffffff style ACT fill:#64748b,stroke:#475569,stroke-width:2px,color:#ffffff style PG fill:#334155,stroke:#1e293b,stroke-width:2px,color:#ffffff style C fill:#155e75,stroke:#164e63,stroke-width:2px,color:#ffffff style D1 fill:#0e7490,stroke:#155e75,stroke-width:2px,color:#ffffff style W fill:#155e75,stroke:#164e63,stroke-width:2px,color:#ffffff style MON fill:#166534,stroke:#14532d,stroke-width:2px,color:#ffffff style Source fill:none,stroke:#94a3b8,stroke-dasharray: 5 5 style Edge fill:none,stroke:#94a3b8,stroke-dasharray: 5 5 style UI fill:none,stroke:#94a3b8,stroke-dasharray: 5 5