Fixes tool name prefix stripping to use server name instead of catalog name.

Fixes #1179 /claim #1179

Problem

Tools are stored as {serverName}__{toolName} but the code was trying to strip {catalogName}__, causing MCP servers to receive incorrectly prefixed tool names.

Solution

Strip server name prefix (the correct prefix) as the primary behavior, removing the incorrect catalog name logic.

Testing

• TypeScript type checking passes
• Tested with n8n MCP server (catalog: n8n, server: n8n-lidar)
• Mock MCP server successfully receives unprefixed tool names
• Tool calls execute successfully

[!NOTE] Fixes tool name prefixing to strip server-name (with catalog-name fallback) and aligns local tool persistence; adds tests and minor e2e config updates.

• Backend
  • Tool call prefixing: In src/clients/mcp-client.ts, strip mcpServerName prefix from toolCall.name; if unchanged and catalog differs, fall back to stripping catalogName.
  • Local tool persistence: In src/routes/mcp-server.ts, persist tools using mcpServer.name as the prefix (remove catalog-name usage).
• Tests
  • Add cases in src/clients/mcp-client.test.ts verifying server-name stripping and catalog-name fallback for mixed naming (n8n-lidar__* vs n8n__*).
  • Maintain existing behaviors across transports and response modifier templates.
• Config
  • Update platform/e2e-tests/knip.config.ts entries (add fixtures.ts and auth setup files) and ignore tsc binary.

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