v4.41.0-rc3: Section plugin, Admonition style, Page export, Agent docs

What's Changed

• feat(cms): add TACC Site Section plugin on Style model by @wesleyboar in #1238
• docs: run a second local CMS (shared or isolated DB) by @wesleyboar in #1237
• docs(agents): clarify PR Changes bullet convention by @wesleyboar in #1239
• docs(agents): require Notes section in PR description by @wesleyboar in #1240
• chore(docker): tag local dev compose build as :local by @wesleyboar in #1243
• ci: build and push core-cms image on GitHub Actions by @wesleyboar in #1244
• docs(agents): add worktree Docker template without Elasticsearch by @wesleyboar in #1241
• docs(agents): add Architecture TOC and Workflows section by @wesleyboar in #1245
• feat(cms): style Bootstrap 4 alerts as Core-Styles admonitions by @wesleyboar in #1242
• refactor(cms): map Bootstrap warning to admonition warning class by @wesleyboar in #1247
• feat: Core-CMS-Plugin-Export-Page by @wesleyboar in #1248

Full Changelog: v4.41.0-rc2...v4.41.0-rc3