chore: replace print() statements with proper logging

[abhicodes0324]

Summary

This PR replaces remaining print() calls in production Python code with proper logging and Django command output (self.stdout / self.stderr), so output is consistent with project conventions.

While doing this cleanup, I also removed plain-text password logging from user creation logs.

Scope is intentionally small and does not change business logic.

References

No linked issue; maintenance cleanup.

Reviewer guidance

• Confirm this is output/logging cleanup only.
• Spot-check command files now use Django output methods.
• Verify no sensitive data is logged.
• Repo search for production print() calls now returns no matches.

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