Docker / compose: STORAGE_API_VERSION=3 for MT and MC feeders

[pskillen]

Parent epic: #341

Type: chore | Area: Deploy

Problem

Production compose may still use STORAGE_API_VERSION=2 after API v3 routes and bot v3 default.

Proposal

• Update Portainer/root compose examples to v3 for meshtastic-bot services.
• Document v1/v2/v3 path matrix in ENV_VARS.
• Deploy API Feeder API v3 routes + v2 node-upsert field aliases #339/feat(packets): feeder v3 routes and v2 node-upsert legacy aliases #340 before bot images defaulting to v3.

Acceptance criteria

• Published compose templates use v3 for new installs.
• Rollback to v2 documented.

[pskillen]

wontfix - this isn't an issue