Relicense software from CC BY-NC 4.0 to AGPL-3.0

[liquidguru]

CC BY-NC 4.0 is not an OSI-approved open-source licence — the NonCommercial clause fails the Open Source Definition by discriminating against a field of endeavour, and Creative Commons themselves advise against CC licences for software. GitHub's licence detector currently classifies this repo as "Other" as a result. This relicenses the code so idGuru is genuinely open source.

What changes

File	Change
LICENSE	Replaced with the canonical AGPL-3.0 text
LICENSE-MEDIA	New — CC BY-NC 4.0, covering the underwater footage, the docs/ screenshots, and any dataset derived from them
underwater_indexer.py	CC BY-NC banner replaced with an AGPL header
launcher.pyw	One-line CC BY-NC notice replaced with a full AGPL header
idguru_main.py	Had no licence header; now carries one
README.md	Licence section rewritten as a code/media split
TODO.md	Distribution section updated

Why AGPL rather than a permissive licence

The AGPL preserves what the NonCommercial clause was actually protecting: anyone commercialising idGuru — including as a hosted service — must publish their source. A permissive licence would not. Sole copyright holder, so dual-licensing stays available if a commercial arrangement ever makes sense.

Why this is unblocked

• Sole copyright holder, no external contributors, no forks
• All dependencies are permissive: anthropic / rich / rawpy MIT, Pillow HPND, Flask BSD-3
• ffmpeg is invoked as a subprocess and never distributed, so no copyleft obligation reaches this code

Notes

• The code and the footage are deliberately licensed separately. CC BY-NC is a poor software licence but a sensible one for a working videographer's archive.
• Releases already distributed under CC BY-NC remain available under those terms.
• No version bump included — there is no version constant in the code, and the changelog stops at v1.2.8. Bump separately if this should be v1.3.
• The AGPL header uses the standard "or (at your option) any later version" wording. Drop it if you want to pin to v3 exactly.
• Once this lands on main, GitHub's licence detector should flip from "Other" to "AGPL-3.0".