Enable Seconds in Scheduler Agent Cron Expressions

[abutov110982]

Currently, the Scheduler Agent supports only 5-part cron expressions (minute, hour, day, month, day-of-week), which limits the scheduling precision to a minimum of one-minute intervals.

To support use cases that require higher precision (e.g., execution every 10 or 30 seconds), the agent should optionally support 6-part cron expressions with a seconds field.

Proposed Enhancement:

• Add support for 6-part cron format: seconds minutes hours day month day-of-week.

• Introduce a new configuration option:

  • Use Seconds (boolean) or Six-Part Format (enum/flag).

• When enabled, the agent interprets the first field as seconds.

• When disabled (default), the agent continues to use the standard 5-part format for backward compatibility.

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Example:

• */10 * * * * * → every 10 seconds (with "Use Seconds" enabled)
• */1 * * * * → every 1 minute (default behavior)

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Backward Compatibility:

• The existing behavior remains unchanged unless the new option is explicitly enabled.
• Validation logic should distinguish between 5-part and 6-part formats based on the setting.