chore: add SPDX headers to framework Python scripts

[mmilanez]

Problem

The repository is Apache-2.0 licensed, but framework Python scripts should carry explicit SPDX headers for downstream reuse and automated license scanning.

Scope

Add SPDX-License-Identifier: Apache-2.0 comments to framework Python scripts and verify tests still pass.

Acceptance criteria

• Python scripts under .agents/scripts/ include SPDX headers.
• Tests continue to pass.
• No generated files or private operational state are changed.

[mmilanez]

Fixed by #14. The merged change adds SPDX-License-Identifier headers to the framework Python scripts under .agents/scripts/, and the required CI checks passed before merge.