feat(api, web): integrate health status management for services and domains

- Added health status and latency fields to service and domain schemas, enhancing monitoring capabilities.
- Implemented health status aggregation for services in the API, allowing for improved health checks and reporting.
- Updated web components to display health status using HealthCheckBadge, improving user visibility of service health.
- Refactored service and domain management components to incorporate health status in various views, enhancing overall functionality.

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

packages/db/src/repos.ts

@@ -8,6 +8,7 @@ import type {
   HealthCheckScope,
   HealthCheckTarget,
   HealthCheckType,
+  IpHealthState,
   IpHealthStatus,
   LbMode,
   Service,
@@ -1466,6 +1467,152 @@ export function listIpHealthStatus(
   `);
 }
 
+export type HealthAggregate = {
+  health_status: IpHealthState;
+  health_latency_ms: number | null;
+};
+
+const UNKNOWN_HEALTH: HealthAggregate = {
+  health_status: "unknown",
+  health_latency_ms: null,
+};
+
+function parseHealthAggregateRow(row: {
+  health_status: string | null;
+  health_latency_ms: number | null;
+}): HealthAggregate {
+  const status = row.health_status;
+  if (
+    status === "up" ||
+    status === "down" ||
+    status === "degraded" ||
+    status === "unknown"
+  ) {
+    return {
+      health_status: status,
+      health_latency_ms: row.health_latency_ms ?? null,
+    };
+  }
+  return UNKNOWN_HEALTH;
+}
+
+const WORST_HEALTH_SQL = sql.raw(`CASE
+  WHEN MAX(CASE
+    WHEN status = 'down' THEN 3
+    WHEN status = 'degraded' THEN 2
+    WHEN status = 'up' THEN 1
+    ELSE 0
+  END) = 3 THEN 'down'
+  WHEN MAX(CASE
+    WHEN status = 'down' THEN 3
+    WHEN status = 'degraded' THEN 2
+    WHEN status = 'up' THEN 1
+    ELSE 0
+  END) = 2 THEN 'degraded'
+  WHEN MAX(CASE
+    WHEN status = 'down' THEN 3
+    WHEN status = 'degraded' THEN 2
+    WHEN status = 'up' THEN 1
+    ELSE 0
+  END) = 1 THEN 'up'
+  ELSE 'unknown'
+END`);
+
+/** Worst status across ip_health_status rows for each ref_id in a scope. */
+export function aggregateIpHealthByRefs(
+  db: Db,
+  scope: HealthCheckScope,
+  refIds: number[],
+): Map<number, HealthAggregate> {
+  const result = new Map<number, HealthAggregate>();
+  if (refIds.length === 0) return result;
+  const idList = sql.join(
+    refIds.map((id) => sql`${id}`),
+    sql`, `,
+  );
+  const rows = db.all<{
+    ref_id: number;
+    health_status: string | null;
+    health_latency_ms: number | null;
+  }>(sql`
+    SELECT ref_id,
+      ${WORST_HEALTH_SQL} AS health_status,
+      MAX(latency_ms) AS health_latency_ms
+    FROM ip_health_status
+    WHERE scope = ${scope} AND ref_id IN (${idList})
+    GROUP BY ref_id
+  `);
+  for (const row of rows) {
+    result.set(row.ref_id, parseHealthAggregateRow(row));
+  }
+  return result;
+}
+
+/** Worst binding-scope health rolled up per service_id. */
+export function aggregateIpHealthByServiceIds(
+  db: Db,
+  serviceIds: number[],
+): Map<number, HealthAggregate> {
+  const result = new Map<number, HealthAggregate>();
+  if (serviceIds.length === 0) return result;
+  const idList = sql.join(
+    serviceIds.map((id) => sql`${id}`),
+    sql`, `,
+  );
+  const rows = db.all<{
+    service_id: number;
+    health_status: string | null;
+    health_latency_ms: number | null;
+  }>(sql`
+    SELECT sb.service_id AS service_id,
+      ${WORST_HEALTH_SQL} AS health_status,
+      MAX(ihs.latency_ms) AS health_latency_ms
+    FROM ip_health_status ihs
+    INNER JOIN service_bindings sb
+      ON ihs.scope = 'binding' AND ihs.ref_id = sb.id
+    WHERE sb.service_id IN (${idList})
+    GROUP BY sb.service_id
+  `);
+  for (const row of rows) {
+    result.set(row.service_id, parseHealthAggregateRow(row));
+  }
+  return result;
+}
+
+export function mergeHealthAggregates(
+  parts: Array<HealthAggregate | undefined | null>,
+): HealthAggregate {
+  const rank: Record<IpHealthState, number> = {
+    unknown: 0,
+    up: 1,
+    degraded: 2,
+    down: 3,
+  };
+  let worst: HealthAggregate = UNKNOWN_HEALTH;
+  let hasAny = false;
+  for (const part of parts) {
+    if (!part) continue;
+    hasAny = true;
+    if (rank[part.health_status] > rank[worst.health_status]) {
+      worst = {
+        health_status: part.health_status,
+        health_latency_ms: part.health_latency_ms,
+      };
+    } else if (
+      part.health_status === worst.health_status &&
+      part.health_latency_ms != null &&
+      (worst.health_latency_ms == null ||
+        part.health_latency_ms > worst.health_latency_ms)
+    ) {
+      worst = {
+        health_status: worst.health_status,
+        health_latency_ms: part.health_latency_ms,
+      };
+    }
+  }
+  return hasAny ? worst : UNKNOWN_HEALTH;
+}
+
 export function getIpHealthStatusRow(
   db: Db,
   scope: HealthCheckScope,