fix(bicep): always suppress LS noise in version/param/param_value contexts

Previously the 'if lru_items:' guard meant that when our catalog returned
an empty list (e.g. a param with no allowed enum values), the Bicep LS
completions (Bicep keywords, schema types) would leak through unchanged.

Now the replace is unconditional for version/param/param_value contexts.
The Bicep LS has no knowledge of our private ACR registry so its output
in these positions is always noise — suppress it even when we have nothing
better to show.

ilsp/bicep_lsp/proxy.py

@@ -201,16 +201,16 @@ def _inject_completions(msg: dict[str, Any], context: dict | None = None) -> byt
         # Default: module name completions
         lru_items = BicepModuleCatalog.as_completion_items()
 
-    if lru_items:
     if ctx_type in ("version", "param", "param_value"):
-            # Replace LS completions entirely — the Bicep LS doesn't know about
+        # Always replace LS completions for private-registry contexts — the
-            # the private registry, so its suggestions here are noise/random.
+        # Bicep LS doesn't know about our ACR, so anything it returns is noise.
+        # Even if lru_items is empty (no enum values for a param), suppress LS.
         if isinstance(result, list):
             msg["result"] = lru_items
         else:
             result["items"] = lru_items
             result["isIncomplete"] = False
-        else:
+    elif lru_items:
         # module_path / unknown: keep LS completions below ours
         for item in items:
             st = item.get("sortText", item.get("label", ""))