feat(FOUR-32405): add Database Indexes to Improve Saved Searches Performance

[rodriquelca]

Issue & Reproduction Steps

Saved Search queries slow down on large datasets because process_request_tokens and related tables lack indexes for common filter columns.

Repro:

• Run a Saved Search filter on a large instance.
• EXPLAIN the query → full table scan or filesort.
• Response time exceeds acceptable thresholds.

Solution

• Added database/migrations/2026_07_27_000000_add_saved_search_indexes.php.
• Added composite indexes on process_request_tokens, category_assignments, process_versions, processes, and process_categories.
• Optimized column order by removing redundant id columns from the middle of composites.
• Made up() idempotent and down() tolerant to foreign-key constraints.

How to Test

php artisan migrate --path=database/migrations/2026_07_27_000000_add_saved_search_indexes.php

Related Tickets & Packages

• https://processmaker.atlassian.net/browse/FOUR-32405

Code Review Checklist

• I have pulled this code locally and tested it on my instance, along with any associated packages.
• This code adheres to ProcessMaker Coding Guidelines.
• This code includes a unit test or an E2E test that tests its functionality, or is covered by an existing test.
• This solution fixes the bug reported in the original ticket.
• This solution does not alter the expected output of a component in a way that would break existing Processes.
• This solution does not implement any breaking changes that would invalidate documentation or cause existing Processes to fail.
• This solution has been tested with enterprise packages that rely on its functionality and does not introduce bugs in those packages.
• This code does not duplicate functionality that already exists in the framework or in ProcessMaker.
• This ticket conforms to the PRD associated with this part of ProcessMaker.

[processmaker-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[mireyacaro]

Approved