Add engineering architecture docs

docs/current-state.md

@@ -45,6 +45,9 @@ now includes a first curated ingestion batch for the active projects.
   - approved registration
   - safe update of existing project registrations
   - refresh
+- implementation-facing architecture notes for:
+  - engineering knowledge hybrid architecture
+  - engineering ontology v1
 - env-driven storage and deployment paths
 - Dalidou Docker deployment foundation
 - initial AtoCore self-knowledge corpus ingested on Dalidou
@@ -208,10 +211,11 @@ This separation is healthy:
 ## Immediate Next Focus
 
 1. Use the new T420-side AtoCore skill and registration flow in real OpenClaw workflows
-2. Tighten retrieval quality for the newly seeded active projects
-3. Define the first broader AtoVault/AtoDrive ingestion batches
-4. Add backup/export strategy for Dalidou machine state
-5. Only later consider deeper automatic OpenClaw integration or write-back
+2. Keep the new engineering-knowledge architecture docs as implementation guidance while avoiding premature schema work
+3. Tighten retrieval quality for the newly seeded active projects
+4. Define the first broader AtoVault/AtoDrive ingestion batches
+5. Add backup/export strategy for Dalidou machine state
+6. Only later consider deeper automatic OpenClaw integration or write-back
 
 ## Guiding Constraints