Enhance foreach functions in calculated items to support partial wildcards within item key parameters (e.g., mssql.waittype.time[PREEMPTIVE*]), enabling flexible aggregation across dynamically discovered items.

Zabbix foreach item filters currently only support:

• full wildcard replacement of entire item key parameters (e.g., key[*], key[*,*])
• not partial matches inside parameters (e.g., key[PREEMPTIVE*] is not supported)

As per documentation, wildcards:

• cannot be used for a part of the item key, host name, or individual parameter.
• must match entire parameters and be fully separated.

This causes the following valid-looking expression to fail:

sum(last_foreach(//mssql.waittype.time[PREEMPTIVE*]))

With the error:

Cannot evaluate function: item ".../mssql.waittype.time[PREEMPTIVE*]" does not exist...

Requested Improvement:
Allow foreach item filters to:

• support partial wildcards inside item key parameters, like:

  /host/mssql.waittype.time[PREEMPTIVE*]

• or even across multiple parameters:

  /host/some.key[*,param2*]

This would enable dynamic aggregation of values e.g. from LLD-discovered items based on patterns - a currently unsupported use case