chore: Modernize signals pgbouncer-mixin

pgbouncer-mixin/config.libsonnet

@@ -1,4 +1,5 @@
 {
+  local this = self,
   // any modular library should include as inputs:
   // 'dashboardNamePrefix' - Use as prefix for all Dashboards and (optional) rule groups
   // 'filteringSelector' - Static selector to apply to ALL dashboard variables of type query, panel queries, alerts and recording rules.
@@ -16,6 +17,7 @@
   dashboardTags: [self.uid],
   uid: 'pgbouncer',
   dashboardNamePrefix: '',
+  metricsSource: ['prometheus'],
 
   // additional params can be added if needed
   dashboardPeriod: 'now-1h',
@@ -34,4 +36,12 @@
   extraLogLabels: ['level'],
   logsVolumeGroupBy: 'level',
   showLogsVolume: true,
+
+  // Signals configuration
+  signals+: {
+    connections: (import './signals/connections.libsonnet')(this),
+    stats: (import './signals/stats.libsonnet')(this),
+    config: (import './signals/config.libsonnet')(this),
+    cluster: (import './signals/cluster.libsonnet')(this),
+  },
 }

pgbouncer-mixin/dashboards.libsonnet

@@ -15,7 +15,7 @@ local logslib = import 'logs-lib/logs/main.libsonnet';
     local panels = this.grafana.panels;
     local stat = g.panel.stat;
     {
-      overview:
+      'overview.json':
         g.dashboard.new(prefix + 'PgBouncer overview')
         + g.dashboard.withPanels(
           g.util.grid.wrapPanels(
@@ -45,7 +45,7 @@ local logslib = import 'logs-lib/logs/main.libsonnet';
         )
         // hide link to self
         + root.applyCommon(vars.singleInstance, uid + '-overview', tags, links { pgbouncerOverview+:: {} }, annotations, timezone, refresh, period),
-      clusterOverview:
+      'clusterOverview.json':
         g.dashboard.new(prefix + 'PgBouncer cluster overview')
         + g.dashboard.withPanels(
           g.util.grid.wrapPanels(
@@ -64,7 +64,7 @@ local logslib = import 'logs-lib/logs/main.libsonnet';
     +
     if this.config.enableLokiLogs then
       {
-        logs:
+        'logs.json':
           logslib.new(
             prefix + 'PgBouncer logs',
             datasourceName=this.grafana.variables.datasources.loki.name,