Move agentops.enums to their respective module

[teocns]

Removing a redundant module agentops.enums and instead moving them in the modules they belong:

• Moved EventType enum from enums.py to event.py
• Moved EndState enum from enums.py to session.py
• Removed enums.py module
• Updated imports across affected files
• Updated dependency graph in tach.yml

[codecov]

Codecov Report

Attention: Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
agentops/partners/autogen_logger.py	0.00%	1 Missing ⚠️
agentops/session.py	85.71%	1 Missing ⚠️

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