fix(vision): dichiara le dipendenze del worker, pin numerico HTTP vs runner

Ruling R9: separa l'extra vision (runner: 4 pacchetti VisionSuite + numpy)
da vision-worker (fastapi, uvicorn, pillow, python-multipart, sopra vision).
Prima il worker risolveva solo perche' vs-pm2d le lista per conto suo; un
domani lo stub di stazione dovra' incorporare il runner senza trascinarsi
dietro un server web che non gli serve.

Aggiorna Dockerfile.vision e README.md al nuovo extra; il test del worker ora
pinna anche il valore numerico del diametro (non solo la chiave), agganciato
alla stessa tolleranza del test in-process del runner.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014BBnuACZSCJqXrMYC3LUMU

pyproject.toml

@@ -53,13 +53,30 @@ dev = [
     "coverage>=7.0.0",
 ]
 
-# Vision runner (VisionSuite submodule). vs-task/vs-measure/vs-pm2d require
-# Python >=3.13 upstream; marker keeps the base 3.11 resolution untouched.
+# Vision runner (VisionSuite submodule): what src/vision/runner.py needs to
+# execute a graph. vs-task/vs-measure/vs-pm2d require Python >=3.13 upstream;
+# marker keeps the base 3.11 resolution untouched. numpy is declared
+# explicitly - runner.py imports it directly, and it must not depend on
+# being pulled in as a side effect of vs-pm2d's own dependencies.
 vision = [
     "visionsuite; python_version>='3.13'",
     "vs-task; python_version>='3.13'",
     "vs-measure; python_version>='3.13'",
     "vs-pm2d; python_version>='3.13'",
+    "numpy; python_version>='3.13'",
+]
+
+# Vision worker (src/vision_worker/): the FastAPI shell around the runner,
+# on top of `vision`. Kept separate on purpose (Ruling R9) - VisionSuite's
+# whole structure exists so a consumer installs only what it needs, and a
+# later station agent embeds the same runner without being a web service.
+# It must not drag fastapi/uvicorn onto shop-floor PCs.
+vision-worker = [
+    "tiemeasureflow[vision]",
+    "fastapi>=0.110.0; python_version>='3.13'",
+    "uvicorn[standard]>=0.30.0; python_version>='3.13'",
+    "pillow>=10.0.0; python_version>='3.13'",
+    "python-multipart>=0.0.6; python_version>='3.13'",
 ]
 
 [project.scripts]