chore(spec): adopt spec-v2.0.0 pin

Author: intentproof-bot

pyproject.toml

@@ -47,7 +47,7 @@ dev = [
 [tool.intentproof]
 # Must match vendored intentproof-spec spec.json + git HEAD — enforced by scripts/check-sdk-spec-pin.sh
 spec-version = "spec-v2.0.0"
-spec-commit = "dd6369f3de1ac69027087b8bcc6ac18c641f1947"
+spec-commit = "d09aaa75b44490aaff47776bef540dffdf09bfc9"
 
 [project.urls]
 Homepage = "https://github.com/IntentProof/intentproof-sdk-python"