chore: upgrade the MCP integration stack

[tdpham2]

Summary

• Pin mcp==1.28.1, fastmcp==3.4.4, and langchain-mcp-adapters==0.3.0 in both supported manifests.
• Adopt the canonical MCP streamable HTTP client name while preserving the SDK FastMCP server and Uvicorn ws="none" behavior.
• Add regression coverage for SDK/standalone FastMCP interoperability, schemas, backend submission, stdio adapters, Academy HTTP adapters, and WebSocket disabling.
• Make existing MCP tests hermetic by using EMT and pytest temporary output paths.

Related issues

None.

Type of change

• Bug fix
• New feature
• Docs
• Chore / refactor / CI

How was this tested?

• ruff check .
• pytest tests/ -k "not tblite" with core install: 290 passed, 28 skipped, 2 deselected
• pytest tests/ -k "not tblite" with Academy, Parsl, and Globus Compute extras: 338 passed, 19 skipped, 2 deselected
• python -m pip check in clean editable and clean wheel environments
• Built sdist and wheel; installed/imported the wheel under Python 3.14
• Resolver dry-runs for Python 3.10, 3.11, 3.12, and 3.13

Checklist

• Branched off the latest main and targets main
• PR is focused on a single logical change (split if it grew large)
• ruff check . passes
• pytest tests/ -k "not tblite" passes (plus extras tests if Academy/backends touched)
• Added/updated tests for the change
• Updated docs / README for any user-facing change (not user-facing)