Enterprise license management

[imran-siddique]

Add enterprise license management for commercial deployments.

Features

• License key generation and validation
• Feature gating based on license tier
• Usage metering and reporting
• License compliance dashboard
• Support for air-gapped environments

Ported from imran-siddique/agent-os#12

[imran-siddique]

Closing — this was a wishlist item ported from predecessor repos. Future work will be tracked via new issues as community interest and contributions emerge. See Discussions for feature requests.