Feat/data edit

[isJimTT]

Summary

Adds inline editing for SQL query result sets, extends backend result-set metadata (table location) and a column-metadata API, improves datasource/table tree layout and long-name display, and fixes the issue where closing all result tabs did not switch back to the Execution Info panel.

Related Issues

none

Type of Change

• Bug fix
• Feature
• Refactor
• Documentation
• Test
• Build / tooling
• Other

Changes

Backend: Extend result-set metadata with table location fields; add fetchColumnMeta API for editable column info.
Frontend: Add ResultEditView and integrate result-set inline editing in Result.vue.
UX: Improve datasource/table tree layout, truncation + tooltip for long names, wider table tree, and cleaner Commit/Rollback visibility.
Fix: Closing all result tabs now switches back to Execution Info instead of showing an empty streaming footer.

Test Plan

• Not tested (explain why below)
• Unit tests
• Integration tests
• Frontend lint / build
• Backend build
• Manual verification

Details:

none

Checklist

• The PR title clearly describes the change.
• The change follows the repository coding standards.
• Documentation was updated when behavior or usage changed.
• Tests were added or updated for behavior changes.
• I checked that generated files, dependency directories, logs, and local artifacts are not included.