Redact MongoDB credentials in connection-string log line (closes #16)

[turbomam]

Why

MongoDBLoader.__init__ logged f"MongoDB connection string: {self.handle}" at INFO level. self.handle is the full URI built by get_mongo_connection_string(), which embeds the username and password in the URL userinfo. So every loader run printed the password to:

• the developer's terminal
• terminal scrollback / tmux logs
• Dagster job output in production
• any CI log that captures the loader's stdout

Discovered while running the loader earlier this session.

What

Log host:port/db only. The full URI is still constructed and stored on self.handle for use by linkml_store; it just no longer appears in human-readable log output.

-            logger.info(f"MongoDB connection string: {self.handle}")
+            logger.info(
+                f"Connecting to mongodb://{self.db_config.db_host}:{self.db_config.db_port}"
+                f"/{self.db_config.db_name}"
+            )

Verification

make test still passes (11 passed, 8 skipped).

Closes #16.

[Copilot]

Pull request overview

Prevents leaking MongoDB credentials by removing an INFO-level log line that printed the full MongoDB URI (including userinfo with username/password). This aligns with the loader’s operational needs (still constructing self.handle for linkml_store) while making runtime logs safe for terminals, CI, and Dagster output.

Changes:

• Replaced INFO logging of the full MongoDB connection string with a host/port/db-only log message.

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