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/Local.py

@@ -7,20 +7,20 @@ import pwd
 import sys
 
 from functools import cache
-from typing import override, TYPE_CHECKING
+from typing import TYPE_CHECKING, override
 
 from ..base import Result, StatResult
 from ..ExecContext import ExecContext as Base
 from ..log import ERR, NOTICE, log
 
 if TYPE_CHECKING:
-    from typing import Any
+    from typing import Any, Callable
 
     from ..Uri import Uri
 
 class Local(Base):
 
-    def __init__(self, uri: str | Uri = 'local', *args, **kwargs) -> None:
+    def __init__(self, uri: str | Uri = 'local', *args: Any, **kwargs: Any) -> None:
         super().__init__(uri, *args, **kwargs)
 
     @cache
@@ -43,9 +43,12 @@ class Local(Base):
             if verbose:
                 log(prio, log_prefix, *args)
 
-        def __make_pty_reader(collector: list[bytes], enc_for_verbose: str):
+        def __make_pty_reader(
+            collector: list[bytes],
+            enc_for_verbose: str,
+        ) -> Callable[[int], bytes]:
 
-            def _read(fd):
+            def _read(fd: int) -> bytes:
                 ret = os.read(fd, 1024)
                 if not ret:
                     return ret
@@ -65,7 +68,7 @@ class Local(Base):
             if interactive:
                 import pty
 
-                def _spawn():
+                def _spawn() -> int:
                     # Apply env in PTY mode by temporarily updating os.environ
                     # around spawn.
                     if mod_env:
@@ -115,7 +118,9 @@ class Local(Base):
             stdout_log_enc = sys.stdout.encoding or 'utf-8'
             stderr_log_enc = sys.stderr.encoding or 'utf-8'
 
-            async def read_stream(stream, prio, collector: list[bytes], log_enc: str):
+            async def read_stream(
+                stream: Any, prio: int, collector: list[bytes], log_enc: str
+            ) -> None:
                 buf = b''
                 while True:
                     chunk = await stream.read(4096)