fix(jenkins): expand primary_view column to text

[bujjibabukatta]

Fixes #8897

Summary

The Jenkins connector can fail during data collection when the generated primary_view value exceeds the current column size limit.

This change:

• Updates PrimaryView from varchar(255) to text.
• Adds a migration to update the _tool_jenkins_jobs.primary_view column for existing installations.
• Registers the migration.

Problem

For Jenkins instances with deeply nested folders and long job paths, the generated primary_view value can exceed 255 characters, resulting in:

Error 1406 (22001): Data too long for column 'primary_view'

This causes Jenkins data collection to fail.

Solution

Use a text column for primary_view and provide a migration so existing installations are updated automatically.

[bujjibabukatta]

Hi, @klesh @Startrekzky

Could you please review and approve the pull request?