[SECURITY][Medium] Weak default sample database passwords in .env

[lhy8888]

Summary

Sample env file used extremely weak default DB credentials.

Severity

Medium

Affected Files

.env

Recommended Remediation

Replace defaults with strong placeholders requiring explicit secure values.

Patch Branch

codex/sec-env-weak-passwords

Patch Commit

63eb9bf

Fork Branch URL

https://github.com/lhy8888/cmdb-security-fork/tree/codex/sec-env-weak-passwords