GET/PUT /api/players/v1/playerPhotoTaggingSetting, ported from the reference's
PlayerDB.Get/SetPlayerPhotoTaggingSetting. Backed by the shared player-settings
KV bag (owned by the `playersettings` worker) under a `PlayerPhotoTaggingSetting`
key rather than its own table.
The setting is served as the enum ORDINAL (0 Anyone / 1 Friends / 2 NoOne) — the
reference registers no JsonStringEnumConverter, so the client decodes a number.
Unset reads back 0; the PUT answers a bare true, or false when the body carries
no recognizable setting, as the reference's bool does.
The write merges into the player's settings map and seeds the `playersettings`
defaults when there is none yet, so writing this key can't cost a player the
seeding that worker's first read would have done.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>