Python: [Bug]: Release validator failed to validate packages

[TaoChenOSU]

Description

The release validator failed to validate release 1.16.0: #7924 with the following error:

{
  "source": "Recovered from the original release-gate output generated before PR #7924 was created.",
  "started_at": "2026-08-27T22:01:35.426456+00:00",
  "mode": "release",
  "base_ref": "upstream/main",
  "python_override": null,
  "deadline_seconds": 900,
  "lockfile": {
    "status": "passed",
    "duration_seconds": 0.203,
    "error": null
  },
  "failed_aggregate_probes": [
    {
      "project_path": ".",
      "package_name": "agent-framework",
      "scenario": "upper",
      "resolution": "highest",
      "python": "3.11",
      "status": "failed",
      "duration_seconds": 76.215,
      "payload": null,
      "error": "\u00d7 No solution found when resolving `--with` dependencies:\n  \u2570\u2500\u25b6 Because only azure-ai-agentserver-responses<=2.1.0 is available\n      and agent-framework-foundry-hosting==1.0.0b260827 depends on\n      azure-ai-agentserver-responses>=2.2.0b1,<3, we can conclude that\n      agent-framework-foundry-hosting==1.0.0b260827 cannot be used.\n      And because only agent-framework-foundry-hosting==1.0.0b260827 is\n      available and you require agent-framework-foundry-hosting, we can\n      conclude that your requirements are unsatisfiable."
    },
    {
      "project_path": "packages\\core",
      "package_name": "agent-framework-core",
      "scenario": "lower",
      "resolution": "lowest-direct",
      "python": "3.11",
      "status": "failed",
      "duration_seconds": 86.05,
      "payload": null,
      "error": "\u00d7 No solution found when resolving `--with` dependencies:\n  \u2570\u2500\u25b6 Because only azure-ai-agentserver-responses<=2.1.0 is available\n      and agent-framework-foundry-hosting==1.0.0b260827 depends on\n      azure-ai-agentserver-responses>=2.2.0b1,<3, we can conclude that\n      agent-framework-foundry-hosting==1.0.0b260827 cannot be used.\n      And because only agent-framework-foundry-hosting==1.0.0b260827 is\n      available and you require agent-framework-foundry-hosting, we can\n      conclude that your requirements are unsatisfiable."
    }
  ],
  "summary": {
    "probes_total": 18,
    "probes_passed": 16,
    "probes_failed": 2
  },
  "updated_at": "2026-08-27T22:07:22.610760+00:00"
}

azure-ai-agentserver-responses==2.2.0b1 is already available: https://pypi.org/project/azure-ai-agentserver-responses/2.2.0b1/

Code Sample

Error Messages / Stack Traces

Package Versions

agent-framework-core

Python Version

No response

Additional Context

No response