Fix SciMLOperators downgrade CI failure

[ChrisRackauckas]

Summary

• Fix downgrade CI failure by adding explicit SciMLOperators compat constraint
• Prevents resolver from trying to find non-existent version 0.3.14

Problem

The downgrade CI was failing with this error:

ERROR: LoadError: Unsatisfiable requirements detected for package SciMLOperators [c0aeaf25]:
 SciMLOperators [c0aeaf25] log:
 ├─possible versions are: 0.1.0-1.4.0 or uninstalled
 └─restricted to versions 0.3.14 by an explicit requirement — no versions left

The issue was that somewhere in the dependency chain, there's an explicit requirement for SciMLOperators version 0.3.14, which doesn't exist. The available versions are 0.1.0-1.4.0.

Solution

Added SciMLOperators = "1" to the [compat] section in Project.toml. This explicit compat constraint:

• Ensures we use SciMLOperators v1.x during dependency resolution
• Overrides any transitive dependency requirements for the invalid 0.3.14 version
• Should fix the downgrade CI by preventing the resolver from trying to find the non-existent version

Test plan

• Verify the change resolves correctly in current environment
• Wait for downgrade CI to pass on this PR
• Ensure all other CI tests continue to pass

🤖 Generated with Claude Code