feat: add lab SQLite migrate, LiteLLM env, and OTEL/Grafana stack

Enable local workshop readiness with executable SQLite migrations, OpenTelemetry hello signals, and a provisioned Grafana demo dashboard over Tempo/Loki/Prometheus.

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

observability/grafana/provisioning/dashboards/dashboards.yml

@@ -0,0 +1,12 @@
+apiVersion: 1
+
+providers:
+  - name: ticketlab
+    orgId: 1
+    folder: TicketLab
+    type: file
+    disableDeletion: false
+    updateIntervalSeconds: 10
+    allowUiUpdates: true
+    options:
+      path: /etc/grafana/provisioning/dashboards/json

observability/grafana/provisioning/dashboards/json/ticketlab-demo.json

@@ -0,0 +1,155 @@
+{
+  "annotations": { "list": [] },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "type": "row",
+      "title": "Metrics",
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 0 },
+      "id": 10,
+      "collapsed": false
+    },
+    {
+      "id": 1,
+      "title": "Hello runs (total)",
+      "type": "stat",
+      "gridPos": { "h": 6, "w": 6, "x": 0, "y": 1 },
+      "datasource": { "type": "prometheus", "uid": "prometheus" },
+      "targets": [
+        {
+          "refId": "A",
+          "expr": "otelcol_ticketlab_hello_runs_total{exported_job=\"ticketlab\"}",
+          "legendFormat": "runs"
+        }
+      ],
+      "options": {
+        "reduceOptions": { "calcs": ["lastNotNull"], "fields": "", "values": false },
+        "colorMode": "value",
+        "graphMode": "area",
+        "justifyMode": "auto",
+        "orientation": "auto",
+        "textMode": "auto"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "thresholds" },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              { "color": "blue", "value": null },
+              { "color": "green", "value": 1 }
+            ]
+          },
+          "unit": "short"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "id": 2,
+      "title": "Hello runs over time",
+      "type": "timeseries",
+      "gridPos": { "h": 6, "w": 18, "x": 6, "y": 1 },
+      "datasource": { "type": "prometheus", "uid": "prometheus" },
+      "targets": [
+        {
+          "refId": "A",
+          "expr": "otelcol_ticketlab_hello_runs_total{exported_job=\"ticketlab\"}",
+          "legendFormat": "{{component}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": {
+            "drawStyle": "line",
+            "lineInterpolation": "smooth",
+            "fillOpacity": 15,
+            "showPoints": "auto",
+            "spanNulls": true
+          },
+          "unit": "short"
+        },
+        "overrides": []
+      },
+      "options": {
+        "legend": { "displayMode": "list", "placement": "bottom", "showLegend": true },
+        "tooltip": { "mode": "single", "sort": "none" }
+      }
+    },
+    {
+      "type": "row",
+      "title": "Logs",
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 7 },
+      "id": 11,
+      "collapsed": false
+    },
+    {
+      "id": 3,
+      "title": "TicketLab logs (Loki)",
+      "type": "logs",
+      "gridPos": { "h": 10, "w": 24, "x": 0, "y": 8 },
+      "datasource": { "type": "loki", "uid": "loki" },
+      "targets": [
+        {
+          "refId": "A",
+          "expr": "{service_name=\"ticketlab\"}",
+          "queryType": "range"
+        }
+      ],
+      "options": {
+        "showTime": true,
+        "showLabels": true,
+        "showCommonLabels": false,
+        "wrapLogMessage": true,
+        "prettifyLogMessage": true,
+        "enableLogDetails": true,
+        "dedupStrategy": "none",
+        "sortOrder": "Descending"
+      }
+    },
+    {
+      "type": "row",
+      "title": "Tracing",
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 18 },
+      "id": 12,
+      "collapsed": false
+    },
+    {
+      "id": 4,
+      "title": "Recent traces (Tempo)",
+      "type": "table",
+      "gridPos": { "h": 10, "w": 24, "x": 0, "y": 19 },
+      "datasource": { "type": "tempo", "uid": "tempo" },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": { "type": "tempo", "uid": "tempo" },
+          "queryType": "traceql",
+          "query": "{ resource.service.name = \"ticketlab\" }",
+          "limit": 20,
+          "tableType": "traces"
+        }
+      ],
+      "options": {
+        "showHeader": true,
+        "cellHeight": "sm",
+        "footer": { "show": false }
+      }
+    }
+  ],
+  "refresh": "5s",
+  "schemaVersion": 39,
+  "tags": ["ticketlab", "otel", "demo"],
+  "templating": { "list": [] },
+  "time": { "from": "now-1h", "to": "now" },
+  "timepicker": {},
+  "timezone": "browser",
+  "title": "TicketLab Demo - Metrics / Logs / Traces",
+  "uid": "ticketlab-demo",
+  "version": 1
+}

observability/grafana/provisioning/datasources/datasources.yaml

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+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    uid: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    editable: false
+
+  - name: Loki
+    type: loki
+    uid: loki
+    access: proxy
+    url: http://loki:3100
+    editable: false
+    jsonData:
+      derivedFields:
+        - datasourceUid: tempo
+          matcherRegex: '"trace_id":"(\w+)"'
+          name: TraceID
+          url: "$${__value.raw}"
+          urlDisplayLabel: View trace
+
+  - name: Tempo
+    type: tempo
+    uid: tempo
+    access: proxy
+    url: http://tempo:3200
+    editable: false
+    jsonData:
+      tracesToLogsV2:
+        datasourceUid: loki
+        spanStartTimeShift: "-1h"
+        spanEndTimeShift: "1h"
+        filterByTraceID: true
+      serviceMap:
+        datasourceUid: prometheus
+      nodeGraph:
+        enabled: true
+      lokiSearch:
+        datasourceUid: loki