change tenant header convention

Author: msukkari

internal/tenant/grpc.go

@@ -19,7 +19,7 @@ import (
 
 const (
 	// headerKeyTenantID is the header key for the tenant ID.
-	headerKeyTenantID = "X-Tenant-ID"
+	headerKeyTenantID = "X-Sourcegraph-Tenant-ID"
 
 	// headerValueNoTenant indicates the request has no tenant.
 	headerValueNoTenant = "none"

internal/tenant/rest_helper.go

@@ -13,7 +13,7 @@ import (
 
 func InjectTenantFromHeader(ctx context.Context, header http.Header) (context.Context, error) {
 	log.Printf("header: %v", header)
-	tenantID := header.Get(headerKeyTenantID)
+	tenantID := header.Get("X-TENANT-ID") // TODO: we don't use headerKeyTenantID here so we don't need to change it and potentially break future grpc changes
 	log.Printf("tenantID: %s", tenantID)
 	if tenantID != "" {
 		tenant, err := tenanttype.Unmarshal(tenantID)