fix(py): rename PyPI distribution to sqlshield-py

The `sqlshield` PyPI name was already taken, so the project is being
published under `sqlshield-py`. The Python import name stays
`sqlshield` (driven by the cdylib `[lib] name` in Cargo.toml).

Also drop the bogus `sqlshield-cli` runtime dependency from
pyproject.toml — it referenced the Rust crate, which doesn't exist on
PyPI, and would have made `pip install sqlshield-py` fail to resolve.

Update the install instructions in the root and per-crate READMEs to
reflect the new distribution name.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: davidsmfreire

README.md

@@ -52,8 +52,8 @@ It checks:
 # Rust users
 cargo install sqlshield-cli
 
-# Python users
-pip install sqlshield
+# Python users (distribution name is `sqlshield-py`; module import is `sqlshield`)
+pip install sqlshield-py
 ```
 
 Or build from source:

sqlshield-py/README.md

@@ -7,9 +7,12 @@ code without touching a database.
 ## Install
 
 ```sh
-pip install sqlshield
+pip install sqlshield-py
 ```
 
+The PyPI distribution name is `sqlshield-py` (the bare `sqlshield` name
+was already taken). The module import is still `sqlshield`.
+
 ## Usage
 
 ### Validate a single query

sqlshield-py/pyproject.toml

@@ -3,17 +3,14 @@ requires = ["maturin>=1.4,<2.0"]
 build-backend = "maturin"
 
 [project]
-name = "sqlshield"
+name = "sqlshield-py"
 requires-python = ">=3.8"
 classifiers = [
     "Programming Language :: Rust",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
 dynamic = ["version"]
-dependencies = [
-    "sqlshield-cli"
-]
 
 [tool.maturin]
 features = ["pyo3/extension-module"]