chore(py): bump sqlshield-py to 0.0.3 and detach from workspace version

PyPI doesn't accept re-uploads of the same version, so the metadata fix
in the previous commit can't ship as 0.0.2. Detach sqlshield-py's
version from the shared workspace.package.version field so future
metadata-only or Python-only fixes can ship without forcing every Rust
crate to bump in lockstep.

Author: davidsmfreire

Cargo.lock

@@ -1,6 +1,9 @@
 [package]
 name = "sqlshield-py"
-version.workspace = true
+# Tracked independently of the rest of the workspace because PyPI
+# rejects re-uploads of the same version, so metadata-only fixes
+# need a fresh number even when no Rust code changed.
+version = "0.0.3"
 edition.workspace = true
 authors.workspace = true
 rust-version.workspace = true