Grotti 3.0 Phase 1: Migrationen, Pool, Queue- und Abzug-Fixes.

Nummerierte SQL-Migrationen, psycopg-Pool, waitress, hängende Queue-Jobs,
sichere History-Abzüge, Chargen-Locks, Upload-/Host-Validierung, ProxyFix.

grotti/moonraker.py

@@ -17,6 +17,16 @@ SLOT_CACHE = {}
 MESH_CACHE = {}
 OBJECT_CACHE = {}
 THUMB_RE_LIMIT = 180_000
+_CACHE_MAX = 128
+
+
+def _trim_cache(cache, max_items=_CACHE_MAX):
+    """Einfache Größenbegrenzung (älteste Keys zuerst bei dict-Reihenfolge)."""
+    while len(cache) > max_items:
+        try:
+            cache.pop(next(iter(cache)))
+        except StopIteration:
+            break
 
 
 def matrix_rows(points):
@@ -343,6 +353,11 @@ def steuern(host, action, params=None):
     """Whitelist-Steuerung ohne freie Konsole."""
     params = params if isinstance(params, dict) else {}
     action = (action or "").strip()
+    # MCP und ältere Clients schicken "value" statt temp/percent.
+    if "temp" not in params and params.get("value") is not None and action in ("nozzle", "bed", "dryer_start"):
+        params = {**params, "temp": params["value"]}
+    if "percent" not in params and params.get("value") is not None and action in ("speed", "flow", "fan"):
+        params = {**params, "percent": params["value"]}
 
     def pct(key, default=100, lo=0, hi=200):
         try:
@@ -492,6 +507,7 @@ def metadata(host, path):
     except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, KeyError):
         data = {}
     META_CACHE[key] = (now, data)
+    _trim_cache(META_CACHE)
     return data
 
 
@@ -518,9 +534,11 @@ def embedded_preview(host, path):
             text = response.read().decode("utf-8", "replace")
     except (urllib.error.URLError, TimeoutError):
         EMBEDDED[key] = None
+        _trim_cache(EMBEDDED)
         return None
     png = embedded_png(text)
     EMBEDDED[key] = png
+    _trim_cache(EMBEDDED)
     return png
 
 
@@ -1117,7 +1135,9 @@ def snapshot(printers):
         }
         try:
             card.update(query(printer["host"]))
-        except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, KeyError) as error:
+        except Exception as error:
+            # Auch RemoteDisconnected / IncompleteRead / ValueError — sonst fällt der ganze Tick aus.
+            print("snapshot %s: %s" % (printer.get("host"), error), flush=True)
             card.update({
                 "ok": False,
                 "state": "offline",