docs(wiki): update project wiki

[fro-bot]

Summary

Weekly wiki update covering changes since the last wiki update (e59a85d).

Major changes documented

Three significant architectural changes landed since the last update:

1. Monorepo extraction (e1b53a0) — Core logic extracted into packages/runtime/ (@fro-bot/runtime). The action imports shared types and functions from this package, enabling future surfaces (Discord gateway) to reuse the runtime.

2. Coordination primitives (510ceb3) — New packages/runtime/src/coordination/ module with S3-backed distributed lock, heartbeat controller, and run-state primitives for cross-surface mutual exclusion.

3. Lock acquisition phase (fbcb62a) — New phase 4 in the execution lifecycle between deduplication and acknowledge. Acquires a per-repo coordination lock via S3 conditional-put. Lock is released in cleanup's finally block.

Pages updated

All 6 canonical pages + index were updated:

• Architecture Overview — Rewrote to document monorepo structure (packages/runtime/, apps/action/), split module map into runtime and action sections, added coordination module
• Execution Lifecycle — Added phase 4 (Acquire Lock), renumbered phases 5–10, documented lock release in cleanup's finally block, updated sources
• Session Persistence — Updated all source paths from src/services/ to packages/runtime/src/, updated prose references
• Prompt Architecture — Updated sources to reflect split between runtime package (packages/runtime/src/agent/) and action-specific prompt code (src/features/agent/)
• Setup and Configuration — Added packages/runtime/src/shared/constants.ts to sources for version pinning
• Conventions and Patterns — Updated source paths, noted conventions apply across both action and runtime package
• Index — Updated summary for Architecture Overview

Lint results

• All wikilinks verified — no broken references
• No orphan pages detected