Make host/port editable for non-managed databases

[pawelangelow]

What

Makes a database's host and port editable from the edit connection
form for non-managed databases, while keeping the endpoint locked for
cloud-managed databases (Redis Cloud and Azure).

Relates to #6148 and #5752

---

Note

Medium Risk
Changes database update validation and connection endpoint editing; misclassification of managed vs non-managed could block legitimate edits or allow stale cloud metadata.

Overview
Non-managed databases can now change host and port in the edit connection form; Redis Cloud and Azure managed instances keep a read-only endpoint in the UI and on the API.

The API adds a guard on PATCH /databases/:id that rejects host/port changes when cloudDetails.cloudId or providerDetails is present, using isEndpointChanged so unchanged values in the payload are not treated as edits. When a non-managed DB still uses the default host:port alias, the display name is synced to the new endpoint unless the user set a custom name or sends an explicit name.

The UI introduces isManagedDatabase (aligned with DatabaseService.isManagedDatabase), wires isManaged through the manual connection flow, shows editable host/port in EditConnection only for non-managed edits, and adjusts DbInfo so read-only endpoint summary appears for managed/cloud cases. Coverage includes unit, API integration, and Playwright e2e for edit host behavior.

^{Reviewed by Cursor Bugbot for commit 90f7bc3. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

Code Coverage - Backend unit tests

St.❔	Category	Percentage	Covered / Total
🟢	Statements	93.11%	16509/17731
🟡	Branches	75.37%	5256/6974
🟢	Functions	87.42%	2530/2894
🟢	Lines	92.96%	15785/16980

Test suite run success

3654 tests passing in 319 suites.

Report generated by 🧪jest coverage report action from 90f7bc3

[github-actions]

Code Coverage - Frontend unit tests

St.❔	Category	Percentage	Covered / Total
🟢	Statements	83.7%	26830/32054
🟡	Branches	69.41%	11421/16454
🟡	Functions	79.02%	7173/9077
🟢	Lines	84.17%	26137/31054

Test suite run success

7600 tests passing in 847 suites.

Report generated by 🧪jest coverage report action from 90f7bc3

[github-actions]

Code Coverage - Integration Tests

Status	Category	Percentage	Covered / Total
🟡	Statements	79.15%	18187/22977
🟡	Branches	61.91%	8482/13699
🟡	Functions	66.91%	2459/3675
🟡	Lines	78.76%	17123/21740