fix: Update DSS plugin paths after consolidation

- Update .mcp.json PYTHONPATH to use project root instead of dss-mvp1
- Fix hardcoded path in dss-mcp-server.py to use relative path

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

dss-claude-plugin/.mcp.json

@@ -10,7 +10,7 @@
       "command": "python3",
       "args": ["${CLAUDE_PLUGIN_ROOT}/servers/dss-mcp-server.py"],
       "env": {
-        "PYTHONPATH": "${CLAUDE_PLUGIN_ROOT}/../dss-mvp1:${CLAUDE_PLUGIN_ROOT}",
+        "PYTHONPATH": "${CLAUDE_PLUGIN_ROOT}/..:${CLAUDE_PLUGIN_ROOT}",
         "DSS_HOME": "${CLAUDE_PLUGIN_ROOT}/../.dss",
         "DSS_DATABASE": "${CLAUDE_PLUGIN_ROOT}/../.dss/dss.db",
         "DSS_CACHE": "${CLAUDE_PLUGIN_ROOT}/../.dss/cache",