security: Add .gitignore and remove sensitive paths

- Add .gitignore to prevent sensitive data
- Replace /home/roman with ~/.claude placeholder
- No API keys or credentials in repository
- No chat logs or conversation history

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

mcp-servers/registry.json

@@ -6,7 +6,7 @@
       "name": "ARC Protocol MCP",
       "description": "Subagent file operations and protocol implementation",
       "command": "python3",
-      "args": ["/home/roman/.claude/ralph-integration/arc/.agent/mcp/arc_mcp_server.py"],
+      "args": ["~/.claude/ralph-integration/arc/.agent/mcp/arc_mcp_server.py"],
       "enabled": true,
       "category": "core"
     },
@@ -14,7 +14,7 @@
       "name": "Claude Memory",
       "description": "Persistent memory and context management for Claude",
       "command": "node",
-      "args": ["/home/roman/.claude/plugins/cache/thedotmack/claude-mem/plugin/scripts/mcp-server.cjs"],
+      "args": ["~/.claude/plugins/cache/thedotmack/claude-mem/plugin/scripts/mcp-server.cjs"],
       "enabled": true,
       "category": "memory"
     },
@@ -31,7 +31,7 @@
       "name": "Filesystem MCP",
       "description": "Local filesystem access and operations",
       "command": "npx",
-      "args": ["-y", "@modelcontextprotocol/server-filesystem", "/home/roman"],
+      "args": ["-y", "@modelcontextprotocol/server-filesystem", "~/.claude"],
       "enabled": true,
       "category": "core"
     },
@@ -65,7 +65,7 @@
       "name": "SQLite MCP",
       "description": "SQLite database operations",
       "command": "npx",
-      "args": ["-y", "@modelcontextprotocol/server-sqlite", "--db-path", "/home/roman/.claude/mcp-servers/data.db"],
+      "args": ["-y", "@modelcontextprotocol/server-sqlite", "--db-path", "~/.claude/mcp-servers/data.db"],
       "enabled": true,
       "category": "database"
     },