docs: start server diagnostics integration

.project-docs/30-worklog/tasks/20260831-integrate-server-diagnostics-8b42c6d1.md

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+# Task: Integrate server diagnostics into main
+
+## Identity
+
+- Task ID: 20260831-integrate-server-diagnostics-8b42c6d1
+- Mode: Integration
+- Branch: main
+- Worktree: /Users/inmanx/Documents/lwltAPI
+- Base commit: 14aa6402d6cff52ccf7abb373eb1896e16f6ae98
+- Owner: codex
+- Status: In progress
+
+## Scope
+
+- Merge the independently advanced `origin/main`, local project-governance/diagnosis commits, and the published WeChat attachment-correlation/diagnostics branch into `main`.
+- Preserve the remote deployment adaptations and Chrome extension `0.5.163` release while retaining the accepted `.project-docs`-only governance boundary.
+- Add production support for attachment URLs that intentionally resolve inside the server environment through an exact, configuration-driven private-host allowlist.
+- Preserve HTTPS, credential rejection, redirect revalidation, DNS pinning, byte limits, declared size, and SHA-256 verification; do not globally permit private/reserved networks.
+- Reconcile accepted promotion candidates into canonical data-flow, business-rule, architecture/current-state, evidence, and deployment documentation where supported.
+- Run all repository gates, commit the integrated result on `main`, and push it to `origin/main`.
+
+## Intent And Constraints
+
+- The user explicitly authorized merging all current work into `main` and pushing a new revision, and explicitly confirmed that the attachment source is expected to use a private address in the server environment.
+- Private-network compatibility must be opt-in per exact hostname or IP. Empty configuration preserves the existing fail-closed SSRF behavior; wildcards, URL prefixes, paths, credentials, and CIDR-wide bypasses are not accepted.
+- Every initial URL and redirect target must be evaluated independently against the same exact allowlist; logging may record only allowlist presence/count and a boolean match, never the configured host values or attachment URL.
+- Resolve the root planning-file merge according to accepted decision `DOC-001`: remote implementation/release facts and immutable archives are retained, but retired root planning files are not restored as active sources.
+- Do not deploy, restart services, mutate Kubernetes, read secrets, access ERP, retry live tasks, or send external messages.
+
+## Outcome
+
+- Not completed.
+
+## Verification
+
+- Not run.
+
+## Follow-ups
+
+- None recorded.
+
+## Promotion Candidates
+
+- None recorded.