Three fixes for broken MCP sidecars:
1. Remove GitHub MCP sidecar entirely - the upstream image
(ghcr.io/modelcontextprotocol/servers/github) is discontinued.
GitHub MCP is now accessed via Copilot API instead.
2. Fix Playwright MCP image - changed from non-existent
microsoft/playwright-mcp to mcr.microsoft.com/playwright/mcp
(the official Microsoft Container Registry image).
3. Fix pgtuner MCP startup command - changed --transport to --mode
and added --host 0.0.0.0 to match the current pgtuner_mcp CLI.
Bumps chart version to 0.3.3.
Closes#40
Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>