Add data model doc and sheets explorer tool

go.mod

@@ -2,14 +2,40 @@ module heliosian
 
 go 1.26
 
-require github.com/chromedp/chromedp v0.16.0
+require (
+	github.com/chromedp/cdproto v0.0.0-20260714215040-dc233986426f
+	github.com/chromedp/chromedp v0.16.0
+	google.golang.org/api v0.293.0
+)
 
 require (
-	github.com/chromedp/cdproto v0.0.0-20260714215040-dc233986426f // indirect
+	cloud.google.com/go/auth v0.23.0 // indirect
+	cloud.google.com/go/auth/oauth2adapt v0.2.8 // indirect
+	cloud.google.com/go/compute/metadata v0.9.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/chromedp/sysutil v1.1.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-json-experiment/json v0.0.0-20260623181947-01eb4420fa68 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.4.0 // indirect
+	github.com/google/s2a-go v0.1.9 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.20 // indirect
+	github.com/googleapis/gax-go/v2 v2.23.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.67.0 // indirect
+	go.opentelemetry.io/otel v1.44.0 // indirect
+	go.opentelemetry.io/otel/metric v1.44.0 // indirect
+	go.opentelemetry.io/otel/trace v1.44.0 // indirect
+	golang.org/x/crypto v0.54.0 // indirect
+	golang.org/x/net v0.57.0 // indirect
+	golang.org/x/oauth2 v0.36.0 // indirect
 	golang.org/x/sys v0.47.0 // indirect
+	golang.org/x/text v0.40.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260807164820-c8921c73eeea // indirect
+	google.golang.org/grpc v1.83.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 )