chore: organize solution into module folders (Core/Server/Drivers/Client/Tooling)

Group all 69 projects into category subfolders under src/ and tests/ so the
Rider Solution Explorer mirrors the module structure. Folders: Core, Server,
Drivers (with a nested Driver CLIs subfolder), Client, Tooling.

- Move every project folder on disk with git mv (history preserved as renames).
- Recompute relative paths in 57 .csproj files: cross-category ProjectReferences,
  the lib/ HintPath+None refs in Driver.Historian.Wonderware, and the external
  mxaccessgw refs in Driver.Galaxy and its test project.
- Rebuild ZB.MOM.WW.OtOpcUa.slnx with nested solution folders.
- Re-prefix project paths in functional scripts (e2e, compliance, smoke SQL,
  integration, install).

Build green (0 errors); unit tests pass. Docs left for a separate pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.IntegrationTests/Docker/docker-compose.yml

@@ -0,0 +1,34 @@
+# FOCAS simulator — focas-mock JSON/TCP + native FOCAS2 Ethernet server.
+#
+# The image is built from the vendored focas-mock snapshot at ./focas-mock/
+# (see focas-mock/VENDORED.md for refresh procedure).
+#
+# Usage:
+#   docker compose -f Docker/docker-compose.yml up -d --wait
+#   docker compose -f Docker/docker-compose.yml down
+#
+# One service, one container — the mock's native FOCAS Ethernet responder
+# auto-detects the binary PDU prefix (`a0 a0 a0 a0`) on the same TCP port
+# that serves JSON admin commands. Tests that need per-series behaviour
+# call `mock_load_profile` via the fixture's admin API at test start.
+# The pre-wire-client era had one compose profile per CNC series; that
+# ceremony is gone because the managed wire client doesn't depend on a
+# per-series shim DLL.
+
+services:
+  focas-sim:
+    image: otopcua-focas-sim:latest
+    build:
+      context: ./focas-mock
+      dockerfile: Dockerfile
+    container_name: otopcua-focas-sim
+    ports:
+      - "8193:8193"
+    restart: "no"
+    command: ["--profile", "FWLIB64"]
+    healthcheck:
+      test: ["CMD-SHELL", "python -c \"import socket; s=socket.create_connection(('127.0.0.1',8193),timeout=2); s.close()\" || exit 1"]
+      interval: 10s
+      timeout: 3s
+      retries: 3
+      start_period: 5s