chore: remove vibe-coding artifacts from tracking, sync notes and obsidian config

- Untrack .claude/launch.json (Claude Code config)
- Add .claude/, .mcp.json, CLAUDE.md, and AI-generated CSVs to .gitignore
- Add _notes/ vault (architecture, API, tasks, bugs, infra docs)
- Add .obsidian/ plugin/vault config (workspace state excluded)
- Sync CHANGELOG.md

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

_notes/06 - Bugs & Issues/Bug Log.md

@@ -0,0 +1,34 @@
+# Bug Log
+
+```dataview
+TABLE status, platform, date AS "Reported"
+FROM "_notes/06 - Bugs & Issues"
+WHERE file.name != "Bug Log"
+SORT date DESC
+```
+
+---
+
+## How to Log a Bug
+
+Create a new note in this folder using the template below:
+
+```
+---
+status: open
+platform: iOS / Android / Web / Desktop
+date: YYYY-MM-DD
+---
+
+## Description
+
+## Steps to Reproduce
+1.
+2.
+
+## Expected Behaviour
+
+## Actual Behaviour
+
+## Fix
+```