v3.0.0b3

What's Changed

• feat(observe): allow disabling function io capture by env var by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1196
• feat(media): allow disabling media handling via envvar by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1199
• fix(langchain): token counts for vertex by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1197
• fix(langchain): filter string keys from usage object by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1191

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.0b2...v3.0.0b3