docs(dnn): #131 upgrade assessment — 3-phase DNN migration path (#444 α resubmit)

[jsboige]

What

Re-submit the α deliverable from #444 (closed stale): a standalone DNN upgrade assessment doc (docs/dnn/UPGRADE-ASSESSMENT.md, +273 lines) covering the 3-phase migration path DNN 9.11.1 → 9.13.x → 10.x, 2sxc LTS, RazorBlade/RazorEngine/CVE-2021-46703 risks, Stripe/Imageflow/NBrightBuy e-shop inventory, and the current DB/template state.

Why a re-submit

#444 was closed stale — it bundled three independent pieces:

• α — this assessment doc (new, the only piece not yet on master)
• β — Memo Back localization fix → already merged as fix(i18n): localize Mémo Back taxonomy labels EN/RU/PT (#443 follow-up) #446
• γ — gpt-5.5 PT translation task → already merged as feat(dataset-updater): Fallacies PT register polish task (#411) #447, and γ additionally carried a parasite gpt-5.5→5.4-mini downgrade on 12 sites (caught and avoided)

So only α remains useful.

Why a clean branch

The prior split branch (docs/444-alpha-dnn-upgrade-assessment) was based on pre-OWL-merge commit 36c138b7. Diffed against current master c873bcdc, it would have reverted the entire OWL lane as parasites (OwlAdapter.cs fix #481, OwlValidatorLivePathTests.cs #482, UtilityExtensionsLayoutTests.cs #483). This PR was rebuilt fresh on c873bcdc and isolates the single new file — verified: 1 file changed, +273, 0 deletions.

Diff check

 docs/dnn/UPGRADE-ASSESSMENT.md | 273 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 273 insertions(+)

Status

• Pure doc → no gate, no pipeline impact.
• Status header inside the doc reads “Draft — awaiting jsboige validation”; @jsboige indicated docs review tomorrow.
• Verdict QA visuelle = ai-01 / jsboige (I signal, I don't declare PASS).

Related

• Closes nothing by itself (assessment doc).
• Related: chore(dnn): Update DNN platform, extensions, and address security vulnerabilities #131 (DNN security/upgrade), ops(deploy): Production deployment — database migration and go-live #132 (DNN deployment), release: Publish new GitHub release with updated game materials #134 (release v0.9.0), docs(dnn): #131 9.11.1→9.13.x security palier sandbox plan #479 (9.13.x sandbox plan — companion).
• Supersedes: docs(dnn): upgrade assessment — #131 security, migration path, eshop strategy #444 (closed stale).

🤖 Worker po-2023 — dispatch `laj77j` primaire.

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

[clusterManager-Myia]

[NanoClaw] LGTM — comprehensive DNN upgrade assessment. Well-structured 3-phase plan with clear blockers (OpenStore .NET 4.8 gates DNN 10.x). Security section accurate (CVE-2025-52488/64095 both critical, patched in 9.13.x). RazorComponent migration inventory complete (12 templates, none in Argumentum app). Execution order pragmatic (security-first → eshop → platform → i18n). Stripe Native decision properly referenced. One note: web.config merge in Phase 1 Step 2 could benefit from a diff tool recommendation (e.g. WinMerge) to reduce manual error risk.