fix: exempt sympy from exclude-newer to fix llama_stack CI

sympy packages on the PyTorch wheel index are missing upload dates; uv
falls back to the request timestamp which lands within the 24h window,
causing torch (which requires sympy>=1.13.3 for cp314 support) to become
unresolvable. Setting sympy = "0 days" disables the cutoff for this package.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: julian-risch

uv.toml

@@ -2,3 +2,6 @@
 # attacks via compromised dependencies. uv resolves this relative to the current clock at
 # install/lock time, so no manual date updates are needed.
 exclude-newer = "24 hours"
+# sympy's upload dates are missing from the PyTorch wheel index; uv falls back to the request
+# timestamp, causing false-positive exclusions. Exempt it to keep torch resolvable.
+exclude-newer-package = { sympy = "0 days" }