fix: enable limit total number of log files

[bohutang]

Problem

Previously, when using hourly log rotation, the system would count each date separately. For example:

• databend-query-default.2025-03-18-10.log
• databend-query-default.2025-03-18-11.log
• databend-query-default.2025-03-19-09.log
• databend-query-default.2025-03-19-10.log

These were treated as different groups, allowing up to 48 files for EACH date. This caused excessive accumulation - in one case, we found 458 log files when the limit was supposed to be 48.

Solution

• Modified the code to recognize that databend-query-default is the common base prefix
• Updated cleanup logic to count all related files together regardless of date/hour
• Added tests that simulate multiple date patterns with hourly rotation

Impact

The system now correctly keeps only the maximum allowed number of log files (e.g., 48) total, even when they have different dates and hours in their names. This prevents disk space issues from log file buildup over multiple days.