Fix Azure host qualification and noisy performance gate

[jeremydixon22]

Summary

• align the Azure Functions host with the Durable Task package line carried by its extension and reject future incompatible graphs
• prove the packaged worker starts locally before the credential-bearing Azure qualification job can run
• require complete Function discovery and retain redacted expected/actual counts on failure
• keep the Python runtime benchmark as manual qualification evidence instead of failing Release Integrity on uncontrolled hosted-runner wall time

Evidence

• reproduced the prior HTTP 503 locally as a Durable Task MissingMethodException
• package graph: 6 packages aligned on 1.24
• local Functions host: 7 functions discovered and host ready
• full .NET solution build and deterministic test suite passed
• Azure live-script success, missing-discovery, and incomplete-discovery cases passed with cleanup and redaction checks
• public export, secret/ownership scans, shell syntax, Actionlint, and benchmark guard semantics passed

No package publication or qualification promotion is authorized by this change.