## DescriptionThis PR ensures that prebuilt workspaces are properly excluded from thelifecycle executor and treated as a separate class of workspaces, fullymanaged by the prebuild reconciliation loop.It introduces two lifecycle guarantees:* When a prebuilt workspace is created (i.e., when the workspace buildcompletes), all lifecycle-related fields are unset, ensuring theworkspace does not participate in TTL, autostop, autostart, dormancy, orauto-deletion logic.* When a prebuilt workspace is claimed, it transitions into a regularuser workspace. At this point, all lifecycle fields are correctlypopulated according to template-level configurations, allowing theworkspace to be managed by the lifecycle executor as expected.## Changes* Prebuilt workspaces now have all lifecycle-relevant fields unsetduring creation* When a prebuild is claimed:* Lifecycle fields are set based on template and workspace levelconfigurations. This ensures a clean transition into the standardworkspace lifecycle flow.* Updated lifecycle-related SQL update queries to explicitly excludeprebuilt workspaces.## Relates Related issue:#18898To reduce the scope of this PR and make the review process moremanageable, the original implementation has been split into thefollowing focused PRs:*#19259*#19263*#19264*#19265These PRs should be considered in conjunction with this one tounderstand the complete set of lifecycle separation changes for prebuiltworkspaces.