ab711c29

Extract vendor-agnostic media conversion into convert package

Move the ffmpeg transcoders, image thumbnail/resize generation, and the
supporting MediaWriter/WriteFile storage plumbing out of importers into a
new vendor-agnostic convert package. The importers package keeps the
TinyBeans-specific import orchestration (ImportMedia, Entry, MediaConverter).

Drop the "Convert"/"Transcode" stutter now that these live under convert:
ConvertGIFToAnimatedAVIF -> GIFToAnimatedAVIF, TranscodeVideoToWebM ->
VideoToWebM. Also de-vendor the ffmpeg-arg comments that referenced
TinyBeans.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Agent Instructions

Each run corresponds to one flake attribute. Click a run for its logs and status.

Example: https://nix-ci.com/cb:mtlynch:little-moments/importers-to-converters/ab711c29b739d3b2a58dd38019655cbfacba037f/fb4acec8-6050-486e-beb1-ca100188cf81

Wait for suite to complete:

curl --netrc -N https://nix-ci.com/cb:mtlynch:little-moments/importers-to-converters/ab711c29b739d3b2a58dd38019655cbfacba037f/wait

This page is also available in machine-friendly formats. Request one with the Accept header:

• curl --netrc -H 'Accept: application/json' https://nix-ci.com/cb:mtlynch:little-moments/importers-to-converters/ab711c29b739d3b2a58dd38019655cbfacba037f
• curl --netrc -H 'Accept: text/markdown' https://nix-ci.com/cb:mtlynch:little-moments/importers-to-converters/ab711c29b739d3b2a58dd38019655cbfacba037f

For more instructions, fetch https://nix-ci.com/instructions .