Added index support in data collector

[mahbd]

PR Type

Feature

PR Checklist

• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• A changelog entry has been made.
• Version number has been updated.
• Required modules have been added to respective "requirements*.txt" files.
• Relevant Test Cases added to this description (below).
• (Team) Label with affected action categories and semver status.

Overview

This PR introduces support for post-indexing data collector results using square bracket notation ([index]) immediately following the collector patterns (curly braces {} or parentheses ()).

Previously, data collectors returned their result set, which could be a list of values (for multiple patterns) or a single value. This change allows users to directly access a specific element from the collected result set using trailing indices, enabling the retrieval of a single value directly without intermediate variable assignment.

For pattern collection (var{p1}{p2}), post-indexing like var{p1}{p2}[0] now accesses the first element of the zipped result set. For key collection (var(k1)(k2)), post-indexing like var(k1)(k2)[0] accesses the indexed element of the resulting structure. Error handling is added for invalid indices or types during post-indexing application.

Test Cases

• [TEST-0000] (Placeholder for specific test case reference if available)

[mahbd]

📚 $\text{Stack Overview}$

Pulls submitted in this stack:

• Added index support in data collector #675 👈
• dev

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