App, cmds, lib: Fix Any returns from typed functions

Add type annotations and casts to functions that were returning Any
where a specific type was declared, satisfying the new warn_return_any
mypy rule.

Fixes:
- log.py: get_caller_pos return type via cast
- AsyncRunner.py: cast T for fut.result()
- util.py: cast for getattr result, str() for args.username
- FileContext.py: verbose_default bool annotation
- SSHClient.py: cast SSHClient for dynamic import
- lib/App.py: cast ArgumentParser, add return types to inner funcs
- pm/rpm.py, dpkg.py: cast Iterable[Package]
- App.py: cast for self.args.func(), add return types to inner funcs
- BaseCmdPkgRelations.py: cast str for args.delimiter

Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev 0.81.1
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/lib/ec/Curl.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import override, TYPE_CHECKING
+from typing import Any, override, TYPE_CHECKING
 
 from ..FileContext import FileContext as Base
 
@@ -13,7 +13,11 @@ if TYPE_CHECKING:
 class Curl(Base):
 
     def __init__(
-        self, uri: str | Uri, *args, ec: ExecContext | None = None, **kwargs
+        self,
+        uri: str | Uri,
+        *args: Any,
+        ec: ExecContext | None = None,
+        **kwargs: Any
     ) -> None:
 
         def __local() -> Local: