feat: push-based config delivery — controller → OpAMP Supervisor → collector (#132)

opentelemetry-collector-contrib-patch/cmd/sketchcol/supervisor-config.yaml

@@ -0,0 +1,32 @@
+# OpAMP Supervisor config for sketch collector.
+#
+# The supervisor connects to the controller's OpAMP server, receives
+# remote config pushes (sketch type, parameters, window duration, etc.),
+# and restarts the collector with the new config automatically.
+#
+# Usage:
+#   ./opampsupervisor --config supervisor-config.yaml
+#
+# The supervisor will:
+#   1. Connect to the controller's OpAMP WebSocket endpoint
+#   2. Start the collector with the initial/bootstrap config
+#   3. When the controller pushes a new config (e.g., after POST /api/v1/plan),
+#      the supervisor writes the new YAML and restarts the collector
+
+server:
+  endpoint: ws://localhost:4320/v1/opamp
+  headers:
+    X-Agent-ID: sketch-agent-1
+    X-Agent-Role: agent
+
+capabilities:
+  accepts_remote_config: true
+  reports_remote_config: true
+  reports_effective_config: true
+  reports_health: true
+
+storage:
+  directory: /tmp/opamp-supervisor
+
+agent:
+  executable: ./countminsketchcol