Refactor docs: topic folders, navigation, protocol sync

- Restructured documentation: added `docs/README.md` to each sub-project, moved LOGGING and SIGNALR docs into dedicated subfolders with their own `README.md`.
- Updated all cross-references to use new topic folder paths and canonical AyCode.Core doc locations.
- Updated `.csproj` files to auto-include all Markdown docs and project-level `README.md` files.
- Removed obsolete single-file docs, replaced with structured content in topic folders.
- Enforced AI Agent Protocol: session setup, output prefix, no-re-read, and mandatory `docs-check` skill after code changes.
- Added domain-critical reminders and navigation guidance to relevant `README.md` files.

Nop.Plugin.Misc.AIPlugin/Nop.Plugin.Misc.FruitBankPlugin.csproj

@@ -668,12 +668,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <None Include="docs\SCHEMA.md" />
+    <None Include="docs\**\*.md" />
-    <None Include="docs\DOMAIN_MODEL.md" />
+    <None Include="**\README.md" Exclude="$(DefaultItemExcludes);docs\**" />
-    <None Include="docs\MEASUREMENT.md" />
-    <None Include="docs\AI_SERVICES.md" />
-    <None Include="docs\DATA_LAYER.md" />
-    <None Include="docs\SIGNALR_ENDPOINTS.md" />
   </ItemGroup>
 
   <!-- This target execute after "Build" target -->

Nop.Plugin.Misc.AIPlugin/README.md

@@ -24,7 +24,7 @@ Project file: `Nop.Plugin.Misc.FruitBankPlugin.csproj`
 | `docs/MEASUREMENT.md` | Three measurement workflows (inbound shipping, outbound order, stocktaking), MeasuringStatus lifecycle, pricing, checkout filter |
 | `docs/AI_SERVICES.md` | OpenAI, Cerebras, Replicate providers, FruitBankSettings, file storage, PDF conversion, audio transcription |
 | `docs/DATA_LAYER.md` | FruitBankDbContext, StockTakingDbContext, DbTable repositories, entity mapping, FruitBankEventConsumer |
-| `docs/SIGNALR_ENDPOINTS.md` | SignalR endpoints, FruitBankDataController, InnVoice/Billingo integration, FruitBankAttributeService |
+| `docs/SIGNALR/README.md` | SignalR endpoints, FruitBankDataController, InnVoice/Billingo integration, FruitBankAttributeService |
 
 ## Folder Structure
 

Nop.Plugin.Misc.AIPlugin/docs/MEASUREMENT.md

@@ -2,7 +2,7 @@
 
 > Part of `Nop.Plugin.Misc.FruitBankPlugin`. See `README.md` for project overview.
 > For entity model see `docs/DOMAIN_MODEL.md`.
-> For SignalR endpoints see `docs/SIGNALR_ENDPOINTS.md`.
+> For SignalR endpoints see `docs/SIGNALR/README.md`.
 > For core measurement system rules and common domain traps, see: `../../../../../FruitBankHybridApp/FruitBank.Common/docs/GLOSSARY.md`
 
 Three parallel measurement workflows share the same weight formula and `MeasuringStatus` lifecycle.

Nop.Plugin.Misc.AIPlugin/docs/README.md

@@ -0,0 +1,31 @@
+# Nop.Plugin.Misc.AIPlugin (FruitBank plugin) documentation
+
+Topic documentation for the FruitBank-specific NopCommerce plugin (Layer 3 — consumer).
+
+## Reference docs (flat)
+
+- [`AI_SERVICES.md`](AI_SERVICES.md) — AI-related service integrations
+- [`DATA_LAYER.md`](DATA_LAYER.md) — Data access specifics for this plugin
+- [`SCHEMA.md`](SCHEMA.md) — Database schema (Toon format — LLM-optimized)
+- [`DOMAIN_MODEL.md`](DOMAIN_MODEL.md) — Business domain behavior
+- [`MEASUREMENT.md`](MEASUREMENT.md) — Weight measurement logic (NetWeight formula, MeasuringStatus lifecycle)
+
+## Topic folders
+
+- [`SIGNALR/`](SIGNALR/README.md) — SignalR endpoints exposed by this plugin (project-specific variant)
+
+## Navigation
+
+Per the AI Agent Core Protocol (folder navigation rule), start from this README when browsing `docs/`. Single-file reference docs remain flat; project-specific variants of framework topics (like SIGNALR) live in named subfolders.
+
+## Critical reminders (inherited from domain)
+
+- **`MeasuringStatus.Finnished`** is an intentional typo — do NOT "fix" the spelling (database-level value).
+- **Weight formula**: `NetWeight = GrossWeight - PalletWeight - (TrayQuantity * TareWeight)`.
+- **MeasuringStatus lifecycle**: NotStarted(0) → Started(10) → Finnished(20) → Audited(30).
+
+## See also
+
+- **Parent framework** (Mango.Nop.Core): `../../../Libraries/Mango.Nop.Core/docs/README.md`
+- **Client-side app**: `../../../../FruitBankHybridApp/docs/README.md`
+- **Host (nopCommerce deployment)**: `../../../../../FruitBank/` (see `.github/copilot-instructions.md` for scope)