MUC room created_at timestamp incorrectly set to 1970-01-02

[YonesSohrabi]

Description

When creating a new MUC room via API or any other method, the created_at field in the muc_room database table is set to 1970-01-02 00:00:00 instead of the actual creation time.

Steps to Reproduce

1. Create a new MUC room:

curl -X POST http://localhost:5285/api/create_room_with_opts \
  -H "Content-Type: application/json" \
  -d '{
    "room": "testroom",
    "service": "conference.localhost",
    "host": "localhost",
    "options": [{"name": "persistent", "value": "true"}]
  }'

2. Check database:

SELECT name, created_at FROM muc_room WHERE name='testroom';

3. Result: created_at = 1970-01-02 00:00:00 ❌

Expected Behavior

created_at should be set to the current timestamp.

Root Cause

In src/mod_muc_sql.erl, the code uses hibernation_time to set created_at. When a room is first created, hibernation_time is not set, defaulting to 1970-01-02 00:00:00.

Environment

• ejabberd: 25.03 (affects all versions)
• Database: MySQL/PostgreSQL/SQLite
• OS: Linux

Proposed Solution

I have a PR ready that:

1. Adds updated_at column to track modifications
2. Ensures created_at is set correctly and never changes
3. Separates created_at, updated_at, and hibernation_time concerns