Release 0.3.15

What's Changed

• Release 0.3.14 by @jacoblee93 in #7611
• fix: Add test for pdf uploads anthropic by @bracesproul in #7613
• feat: Update google genai to support file uploads by @bracesproul in #7612
• chore(google-genai): Drop .only in test by @bracesproul in #7614
• release(google-genai): 0.1.7 by @bracesproul in #7615
• fix(core): Fix stream events bug when errors are thrown too quickly during iteration by @jacoblee93 in #7617
• release(core): 0.3.37 by @jacoblee93 in #7619
• fix(langchain): Fix Groq import for hub by @jacoblee93 in #7620

Full Changelog: 0.3.14...0.3.15