fix: stream provisioner logs (#7712)

* stream provisioner logs

Signed-off-by: Spike Curtis <spike@coder.com>

* Fix imports

Signed-off-by: Spike Curtis <spike@coder.com>

* Better logging, naming, arg order

Signed-off-by: Spike Curtis <spike@coder.com>

---------

Signed-off-by: Spike Curtis <spike@coder.com>

provisionersdk/logs.go

@@ -0,0 +1,20 @@
+package provisionersdk
+
+import (
+	"fmt"
+
+	"github.com/google/uuid"
+)
+
+// ProvisionerJobLogsNotifyMessage is the payload published on
+// the provisioner job logs notify channel.
+type ProvisionerJobLogsNotifyMessage struct {
+	CreatedAfter int64 `json:"created_after"`
+	EndOfLogs    bool  `json:"end_of_logs,omitempty"`
+}
+
+// ProvisionerJobLogsNotifyChannel is the PostgreSQL NOTIFY channel
+// to publish updates to job logs on.
+func ProvisionerJobLogsNotifyChannel(jobID uuid.UUID) string {
+	return fmt.Sprintf("provisioner-log-logs:%s", jobID)
+}