fix(perc-content-explorer): PSSearchDialog rawtypes residual (#2993)

[natechadwick-intsof]

Summary

Parameterize residual rawtypes/unchecked on Desktop Content Explorer PSSearchDialog after #2939 / PR #2992.

• PSSearchDialog: ctor/m_searchFieldFilterMap use Map<?, ?>; searchable fields cache Map<String, PSContentEditorFieldCataloger>; typed Iterator<PSSearchField> / Iterator<PSDisplayFormat>
• Extracted pure helpers: collectSearchFieldNames, buildDisplayFormatIdNameMap, findDisallowedSynonymExpansionChars
• Unit tests: PSSearchDialogTest (9)
• Did not touch PSFolderAclEditorDialog ([8.2] perc-content-explorer: PSFolderAclEditorDialog rawtypes residual (#2380/#2045) #2439 In Progress)
• Left for next residual: PSOptionManager (module still has raw Collection/Iterator/Map)

No product behavior change (compiler tech-debt only).

Parent residual tracker: #2326
Parent module: #2045
Monorepo: #2200
Prior slice: #2939

Fixes #2993

Test plan

• cd modules/DesktopContentExplorer && ../../mvnw.cmd clean install
• BUILD SUCCESS — Tests run: 139, Failures: 0
• Erlang self-review: docs/ai-generated/code-reviews/issue-2993-pssearchdialog-rawtypes-erlang.md

Product documentation

• N/A — pure rawtypes/generics tech-debt; no operator/user/API surface change

Build evidence (C3)

• modules_built: modules/DesktopContentExplorer
• build_evidence: cd modules/DesktopContentExplorer; ../../mvnw.cmd clean install → BUILD SUCCESS; Tests run: 139, Failures: 0, Errors: 0, Skipped: 0
• downstream_checked: none (C2 N/A for final/sealed; ctor Maps tightened to types already used at sole call sites in PSActionManager — module suite compiled + tested)

Operator: Grok: night-issue-prs (model grok-4.5)

Co-Authored by Grok Build using grok-4.5 with agent main.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (3 files)

• modules/DesktopContentExplorer/src/main/java/com/percussion/cx/PSSearchDialog.java
• modules/DesktopContentExplorer/src/test/java/com/percussion/cx/PSSearchDialogTest.java
• docs/ai-generated/code-reviews/issue-2993-pssearchdialog-rawtypes-erlang.md

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_{Reviewed by step-3.7-flash · Input: 65.4K · Output: 8.8K · Cached: 584.3K}

_{Review guidance: REVIEW.md from base branch main}