chore(main): release 3.4.0

[omms-release]

🤖 I have created a release beep boop

3.4.0 (2026-09-28)

Features

• external API, saved directory maps, and import progress (cbf2fec)
• external API, saved directory maps, and import progress (8d09784)

Bug Fixes

• address review findings in backfill controls, maps, and key files (2ee8061)
• opencode: keep profile fallback and import model registry ready (c847d3b)
• web: address review findings in the explorer and Settings page (dbeb25b)
• web: save migrated tags and vectors in one update (e95d1c7)
• web: tag migration touches only untagged memories (72d1722)

Documentation

• archive a completed OpenSpec change before opening its pull request (b77ae14)
• archive auto-backfill-and-web-autostart OpenSpec change (f242b65)
• archive auto-backfill-and-web-autostart OpenSpec change (290ca79)
• openspec: archive external-api-backfill-maps-progress (e71e8f1)
• openspec: propose moving OpenCode model code into its adapter (148658d)
• settings page guide and plain-language docs audit (56cc36a)
• settings page guide, docs audit, and OpenSpec archive (751d12b)

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[omms-release]

🤖 Created releases:

• v3.4.0

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