visidata: add IOC types with cached, throttled lookups

Centralize provider caching and rate-limit handling, then add Domain/URL/Hash IOC types and safer VT/IPInfo key resolution so lookups stay reliable on free-tier APIs.

config/visidata/plugins/iplib.py

@@ -96,6 +96,10 @@ class IPInfo:
             return self.raw.get(name)
         raise AttributeError(name)
 
+    def __call__(self) -> "IPInfo":
+        # Allow `ip.ipinfo()` in VisiData expressions.
+        return self
+
 
 @dataclass(frozen=True)
 class ASNInfo:
@@ -114,6 +118,9 @@ class ASNInfo:
             return self.raw.get(name)
         raise AttributeError(name)
 
+    def __call__(self) -> "ASNInfo":
+        return self
+
 
 @dataclass(frozen=True)
 class VTInfo:
@@ -150,6 +157,9 @@ class VTInfo:
             return self.raw.get(name)
         raise AttributeError(name)
 
+    def __call__(self) -> "VTInfo":
+        return self
+
 
 @dataclass(frozen=True)
 class GeoInfo:
@@ -173,6 +183,9 @@ class GeoInfo:
             return self.raw.get(name)
         raise AttributeError(name)
 
+    def __call__(self) -> "GeoInfo":
+        return self
+
 
 def _to_float(v: Any) -> Optional[float]:
     try: