chore(logs): silence models-dev-cache log on unchanged refreshes

The periodic 5-minute API refresh was logging 'models-dev-cache: API
layer loaded N model limits' on every tick, even when the model count
was identical to the previous load. Log only on first successful load
or when the count changes, so the common no-op refresh stays quiet.

Author: ualtinok

packages/plugin/src/shared/models-dev-cache.ts

@@ -237,9 +237,19 @@ export async function refreshModelLimitsFromApi(client: OpencodeClient): Promise
             }
         }
 
+        const previousSize = apiCache?.size ?? null;
         apiCache = map;
         apiLoadedAt = Date.now();
-        sessionLog("global", `models-dev-cache: API layer loaded ${map.size} model limits`);
+        // Log only on first successful load or when the model count changes,
+        // so the 5-minute periodic refresh doesn't spam the log.
+        if (previousSize === null || previousSize !== map.size) {
+            sessionLog(
+                "global",
+                `models-dev-cache: API layer loaded ${map.size} model limits${
+                    previousSize !== null ? ` (was ${previousSize})` : ""
+                }`,
+            );
+        }
     } catch (error) {
         sessionLog(
             "global",