feat: add register agent in db

internal/hub/store/sqlc/gen/models.go

@@ -0,0 +1,21 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.30.0
+
+package gen
+
+import (
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+type Agent struct {
+	ID           int64
+	AgentID      string
+	AgentName    *string
+	Architecture string
+	System       string
+	Hostname     string
+	Version      string
+	Capabilities []byte
+	RegisteredAt pgtype.Timestamp
+}