来自 #33248 的回收: 独立 PR 可登上主分支

Sub-issue of #32946. Tracks the standalone PRs that salvage the good parts of the closed PR #33248 (branch harshach/split-entity-repo) and its Collate companion open-metadata/openmetadata-collate#6639 (branch harshach/entity-module-compat). Do not delete either branch — they are the source of every hunk below. And do not cherry-pick whole files or whole commits: the OSS branch carries a repo-wide automated comment reflow that damaged comments in PatchEntityTool.java, FieldPathUtils.java and EntityUtil.java and stripped ~800 comment lines from BaseEntityIT. Every port is hunk-level, taken from git diff origin/main...harshach/split-entity-repo -- <file>.

Plan and rationale: docs/plans/2026-09-17-entity-repository-epic.md (#33516).