[8.2] sitemanage Xlint residual after this-escape DTO batch (#2032 / #2980) #2999

Parent / tracker: #2200
Slice of: #2032 (sitemanage Xlint)
After: #2980 / this-escape DTO constructor batch (this PR)

Role

Next PR-sized residual for projects/sitemanage main-source -Xlint after DTO this-escape batch.

Dominant remaining clusters (post-#2980)

1. this-escape service/listener/register (~31) — constructors that register this with Spring/listeners/monitors/path services (e.g. PSPageImportQueue, PSAssetChangeListener, path item services, process monitors, widget builder). Prefer private/final init helpers or justified suppress when publish-to-registry is intentional.
2. serial-field residual (~14 non-collection) — nested non-serializable types on DTOs.
3. misc other (~30) — static qualification, equals/hashCode, Hibernate Session.get deprecation, fall-through, redundant cast, etc.
4. Test-source Xlint — separate batch if main residual still large.

Constraints

• Prefer real init-order / type fixes; preserve Spring/test wiring types exactly
• Do not touch rest API contracts unless forced
• Avoid mega-refactors; one PR-sized cluster (prefer related service/listener this-escape subset, not all remaining at once)
• cd projects/sitemanage && ../../mvnw.cmd clean install must stay green
• If more than one PR remains after that slice, file another residual child

Leave unassigned.

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