Added debug logging throughout the mcp-server components using the standard Go `log` package. All log messages are prefixed with `[MCP]` for easy identification.
This includes logging in: main function (startup, CLI execution, registration, serve loop), Tool handlers, Native and WASM fetcher implementations, Wikipedia, Wikidata, and DBpedia data fetching functions
Replaced previous `println` statements with `log.Println` or `log.Printf`.