Add ez-assistant and kerberos service folders

docker-compose/ez-assistant/docs/concepts/usage-tracking.md

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+---
+summary: "Usage tracking surfaces and credential requirements"
+read_when:
+  - You are wiring provider usage/quota surfaces
+  - You need to explain usage tracking behavior or auth requirements
+---
+# Usage tracking
+
+## What it is
+- Pulls provider usage/quota directly from their usage endpoints.
+- No estimated costs; only the provider-reported windows.
+
+## Where it shows up
+- `/status` in chats: emoji‑rich status card with session tokens + estimated cost (API key only). Provider usage shows for the **current model provider** when available.
+- `/usage off|tokens|full` in chats: per-response usage footer (OAuth shows tokens only).
+- `/usage cost` in chats: local cost summary aggregated from Moltbot session logs.
+- CLI: `moltbot status --usage` prints a full per-provider breakdown.
+- CLI: `moltbot channels list` prints the same usage snapshot alongside provider config (use `--no-usage` to skip).
+- macOS menu bar: “Usage” section under Context (only if available).
+
+## Providers + credentials
+- **Anthropic (Claude)**: OAuth tokens in auth profiles.
+- **GitHub Copilot**: OAuth tokens in auth profiles.
+- **Gemini CLI**: OAuth tokens in auth profiles.
+- **Antigravity**: OAuth tokens in auth profiles.
+- **OpenAI Codex**: OAuth tokens in auth profiles (accountId used when present).
+- **MiniMax**: API key (coding plan key; `MINIMAX_CODE_PLAN_KEY` or `MINIMAX_API_KEY`); uses the 5‑hour coding plan window.
+- **z.ai**: API key via env/config/auth store.
+
+Usage is hidden if no matching OAuth/API credentials exist.