docs: lessons learned from 2026-07-12 session

- gpu-fleet: Corrected architecture (direct GPU, no router in path).
  Updated context values (RTX 3090=256K, not 128K). Added api-key
  standardization requirement.
- gpu-self-heal: Added Lessons Learned section with 5 critical findings:
  L1: API key standardization (RTX 5070 sk-loc...5678 vs not-needed)
  L2: Fallback chain cascading failure loop detection
  L3: Verify running state, not documentation
  L4: Infisical fallback requirement (.env must have uncommented key)
  L5: Zulip event queue can silently die after ~40 reconnects
- litellm-self-heal: Updated status manual-only→deployed, cron schedule
- litellm-api-keys: Added Infisical token expiry warning + .env fallback
- hermes-config-template: Rule 3 updated with .env fallback requirement

hermes-zulip-plugin.prose.md

@@ -28,7 +28,7 @@ connectivity recovery including end-to-end DM validation.
 
 | Param | Type | Required | Default | Description |
 |-------|------|----------|---------|-------------|
-| `target` | string | yes | — | Agent name: `mumuni`, `tanko`, or `koby` |
+| `target` | string | yes | — | Agent name: `mumuni`, `tanko`, `koby`, or `shumba` |
 | `branch` | string | no | `master` | Git branch to pull (overridable for pinning) |
 
 ## Maintains
@@ -58,6 +58,7 @@ connectivity recovery including end-to-end DM validation.
 | Mumuni | CT114 | — | 192.168.68.123 | /root/.hermes | root |
 | Tanko | CT112 | amdpve | 192.168.68.122 | /home/jerome/.hermes | jerome |
 | Koby | CT111 | amdpve | 192.168.68.129 | /root/.hermes | root |
+| Shumba | — | — | 192.168.68.119 | /home/lucky/.hermes | lucky |
 
 | Field | Value | Trust |
 |-------|-------|-------|