feat: add swarm-common obsidian vault

Add Obsidian vault to the swarm-common virtiofs share for access
from zap VM and other VMs. Contains agent memory, notes, and
infrastructure documentation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

swarm-common/obsidian-vault/zap/memory/archive/session-summaries/2026-03-04-test-confirmation.md

@@ -0,0 +1,35 @@
+# Session: 2026-03-04 06:00:43 UTC
+
+- **Session Key**: agent:main:main
+- **Session ID**: 1a17fa58-6c37-4743-9489-69e1442c145c
+- **Source**: gateway:sessions.reset
+
+## Conversation Summary
+
+user: Sender (untrusted metadata):
+```json
+{
+  "label": "openclaw-tui (gateway-client)",
+  "id": "gateway-client",
+  "name": "openclaw-tui",
+  "username": "openclaw-tui"
+}
+```
+
+[Wed 2026-03-04 05:59 UTC] test
+assistant: [[reply_to_current]] Got it — test received ✅
+assistant: Current thinking level: low.
+Options: off, minimal, low, medium, high, xhigh, adaptive.
+assistant: Thinking level set to medium.
+user: Sender (untrusted metadata):
+```json
+{
+  "label": "openclaw-tui (gateway-client)",
+  "id": "gateway-client",
+  "name": "openclaw-tui",
+  "username": "openclaw-tui"
+}
+```
+
+[Wed 2026-03-04 06:00 UTC] test
+assistant: [[reply_to_current]] Received — test successful ✅