feat: sync deployed v1.0.0-rc.38-custom.42

Sync production source including routing, billing, Astra detection and public uptime. Update custom build instructions and license packaging.

setting/billing_setting/builtin_billing.go

@@ -3,6 +3,11 @@ package billing_setting
 // Built-in token prices use actual USD per million tokens. Keep new model
 // defaults here instead of splitting them across the legacy ratio tables.
 var builtinBillingExpr = map[string]string{
+	// https://developers.openai.com/api/docs/pricing (Standard, 2026-09-09).
+	// The Images API reports image output in output_tokens, normalized to c.
+	"gpt-image-2":            `tier("standard", p * 5 + cr * 1.25 + img * 8 + img_cr * 2 + c * 30)`,
+	"gpt-image-2.5-sunburst": `tier("standard", p * 5 + cr * 1.25 + img * 8 + img_cr * 2 + c * 30)`,
+	"gpt-image-2.5-flare":    `tier("standard", p * 5 + cr * 1.25 + img * 8 + img_cr * 2 + c * 30)`,
 	// https://developers.openai.com/api/docs/models/gpt-6-astra
 	// Standard pricing; the long-context rates apply to the whole request.
 	// Do not infer service-tier discounts from incoming request parameters: