chore(deps): bump socketdev floor to >=3.4.0 (CE-360)

Track the SDK/CLI dependency on socketdev 3.4.0 (fail-open batch purl fix,
SocketDev/socket-sdk-python#98). No code change: the CLI's only purl.post
call site is license enrichment (get_license_text_via_purl), which uses none
of the new params and intentionally stays fail-open, so there is nothing to
adopt here -- this is purely a floor bump so the dependency isn't forgotten.

uv.lock is intentionally NOT regenerated here: socketdev 3.4.0 is not yet on
PyPI. Regenerate once it publishes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: lelia <2418071+lelia@users.noreply.github.com>

Author: lelia

pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
     'GitPython',
     'packaging',
     'python-dotenv',
-    "socketdev>=3.3.0,<4.0.0",
+    "socketdev>=3.4.0,<4.0.0",
     "bs4>=0.0.2",
     "markdown>=3.10",
     "brotli>=1.0.9; platform_python_implementation == 'CPython'",