chore(main): release 3.9.0

[flagsmithdev]

🤖 I have created a release beep boop

3.9.0 (2024-08-12)

Features

• Add indentity overrides to local evaluation mode (#72) (f8fd387)
• analytics-flags: Add support for feature flag analytics (#9) (6317cdb)
• Bump flagsmith-flag-engine to 5.0.0 (#69) (96524b9)
• strict typing (#70) (ed535de)
• Support transient identities and traits (#93) (0a11db5)

Bug Fixes

• Add a custom exception for invalid features (#86) (fd20941)
• Flaky test_offline_mode__local_evaluation__correct_fallback (#103) (a2136d7)
• Offline handler not used as fallback for local evaluation mode during init (#100) (6f6d595)
• Package version not bumped during automatic release (#102) (840bc0e)
• Set the environment for local evaluation mode on init (#76) (5fc5559)

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