feat(terraform): null-aware data model with pointer-based references (#1855)

## Terraform
- [Null-aware data model with pointer-based references for proper patch
style
support](speakeasy-api/openapi-generation#3716)

Author: bradcypert

go.mod

@@ -40,7 +40,7 @@ require (
 	github.com/speakeasy-api/huh v1.1.2
 	github.com/speakeasy-api/jq v0.1.1-0.20251107233444-84d7e49e84a4
 	github.com/speakeasy-api/openapi v1.15.1
-	github.com/speakeasy-api/openapi-generation/v2 v2.808.1
+	github.com/speakeasy-api/openapi-generation/v2 v2.809.0
 	github.com/speakeasy-api/sdk-gen-config v1.47.1-0.20260204112308-f8a62f6aa764
 	github.com/speakeasy-api/speakeasy-agent-mode-content v0.2.0
 	github.com/speakeasy-api/speakeasy-client-sdk-go/v3 v3.26.7

go.sum

@@ -548,8 +548,8 @@ github.com/speakeasy-api/libopenapi v0.21.9-fixhiddencomps-fixed h1:PL/kpBY5vkBm
 github.com/speakeasy-api/libopenapi v0.21.9-fixhiddencomps-fixed/go.mod h1:Gc8oQkjr2InxwumK0zOBtKN9gIlv9L2VmSVIUk2YxcU=
 github.com/speakeasy-api/openapi v1.15.1 h1:t8H/zMU9EdzpfLiHfBdmVNRBXmT/o4KBE9XKoC/zYa4=
 github.com/speakeasy-api/openapi v1.15.1/go.mod h1:aiVj+JnirrwZDtKegt0hQrj/ixl3v17EkN2YGnTuSro=
-github.com/speakeasy-api/openapi-generation/v2 v2.808.1 h1:dV6w2V9LCitNiuVuOh8IXryCcaRj1wFXFdkDzUoPeQo=
-github.com/speakeasy-api/openapi-generation/v2 v2.808.1/go.mod h1:yAqSSEVAOM8UeYHQ5KqsnFIJlCzN3TJ2OHb57PGNw9w=
+github.com/speakeasy-api/openapi-generation/v2 v2.809.0 h1:U2UKgjKFqFz2c8yLy0fwaaCdQ42RE2Cdf/99D4xEKvw=
+github.com/speakeasy-api/openapi-generation/v2 v2.809.0/go.mod h1:yAqSSEVAOM8UeYHQ5KqsnFIJlCzN3TJ2OHb57PGNw9w=
 github.com/speakeasy-api/sdk-gen-config v1.47.1-0.20260204112308-f8a62f6aa764 h1:oedp+8lhOvqzL2nzChwn1xZZMrTegch7dWo7HTpOqAg=
 github.com/speakeasy-api/sdk-gen-config v1.47.1-0.20260204112308-f8a62f6aa764/go.mod h1:kD0NPNX5yaG4j+dcCpLL0hHKQbFk6X93obp+v1XlK5E=
 github.com/speakeasy-api/speakeasy-agent-mode-content v0.2.0 h1:xqEoL+MY3gqJkDMjBqP++fieYilgI1pOeYycHfG3EUE=