Add python -m sentineldeck so it runs without Scripts on PATH

When pip does a user install, its Scripts directory is often not on PATH, so the
bare sentineldeck command is not found even though the package imports fine. A
__main__ module lets `python -m sentineldeck` run the CLI regardless of PATH, and
the README documents it alongside pipx.

Author: sanmaxdev

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project are documented here. The format is loosely
 based on [Keep a Changelog](https://keepachangelog.com/), and the project aims
 to follow semantic versioning once it reaches 1.0.
 
+## [2.2.2] - 2026-06-29
+
+### Added
+
+- `python -m sentineldeck` now runs the CLI — a PATH-independent way to start it
+  when pip does a user install and its Scripts directory is not on PATH (so the
+  bare `sentineldeck` command is not found). The README documents the fallback.
+
 ## [2.2.1] - 2026-06-29
 
 ### Fixed

README.md

@@ -213,6 +213,17 @@ Either way, this puts the `sentineldeck` command on your path. To verify:
 sentineldeck --version
 ```
 
+> **`sentineldeck: command not found` (or "not recognized" on Windows)?**
+> `pip` did a *user* install and its Scripts directory is not on your `PATH`. The
+> package is installed fine — run it as a module, which never depends on `PATH`:
+>
+> ```bash
+> python -m sentineldeck scan example.com
+> ```
+>
+> Or install with [pipx](https://pipx.pypa.io/), which puts the command on your
+> `PATH` for you: `pipx install sentineldeck`.
+
 For development, install the dev extras (pytest and ruff):
 
 ```bash

src/sentineldeck/__init__.py

@@ -1,3 +1,3 @@
 """SentinelDeck: passive attack-surface visibility for small businesses."""
 
-__version__ = "2.2.1"
+__version__ = "2.2.2"

src/sentineldeck/__main__.py

@@ -0,0 +1,8 @@
+"""Allow ``python -m sentineldeck`` as an alternative to the ``sentineldeck``
+console script. Handy when pip did a user install and the Scripts directory is
+not on PATH, so the command is not found but the package still imports.
+"""
+from sentineldeck.cli import main
+
+if __name__ == "__main__":
+    raise SystemExit(main())