PIPE-2949: resolve spw name to virtual ID and populate target vis in `editimlist`
- Resolve SPW names and center frequencies to virtual SPW IDs via `real2virtual_spw_id` in `hif_editimlist`.
- Populate imlist_entry['vis'] for all imaging modes so downstream `hif_makeimages`/`tclean` receives the expected MS list.
- Normalize vislist and guard reference MS resolution in editimlist.
- Add fallback in CleanTaskFactory to use image_heuristics.vislist if target['vis'] is unset.
Pull request #2020: PIPE-3252 docs branching and rtd versioning
Merge in PIPE/pipeline from PIPE-3252-docs-branching-and-rtd-versioning to main
* commit '1de46b530b0126c4fa373a3cb8dd5160a0e0a14b':
docs: update Jira ticket and figure directives.
Add link to CAS-14874 on Jira
Update CASA 2026 known issues to include the CAS-14874 bug.
