feat: module_levels for per-logger level overrides at setup

add an optional module_levels={logger_name: level} param to setup_logging,
the ergonomic way to quiet noisy dependencies (motor/pymongo/aiohttp -> WARNING)
from the one entry-point call instead of scattering setLevel afterwards.

- exact logger-name match, no discovery; stdlib hierarchy applies so naming a
  parent quiets its subtree
- str or int level per entry, same normalization as root level
- bad level for one entry is skipped + warned, never raises (never-crash rule)
- module_levels=None/{} (default) is byte-identical to prior behavior

additive, backwards-compatible -> v0.3.0.

Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "log_setup"
-version = "0.2.0"
+version = "0.3.0"
 description = "stdlib app-entry-point logging setup: live run.log, rotation, gzip, retention, consistent format"
 requires-python = ">=3.10"
 dependencies = []