Support generally available gemini-2.0-flash

[yu-iskw]

User description

gemini-2.0-flash is now GA. So, it would be good to replace the experimental model of gemini-2.0-flash-exp with it.

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PR Type

Enhancement

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Description

• Replaced experimental model gemini-2.0-flash-exp with GA gemini-2.0-flash.

• Updated model references in pr_agent/algo/__init__.py.

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Changes walkthrough 📝

	Relevant files
Enhancement	__init__.py Replace experimental model with GA version                              pr_agent/algo/init.py Replaced gemini-2.0-flash-exp with gemini-2.0-flash. Updated model references in two locations. +2/-2

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Learned best practice	Replace hardcoded numeric values with named constants to improve maintainability and readability Extract the hardcoded context window size (1048576) into a named constant at the module level. This makes it easier to update the value if needed and improves code readability by giving semantic meaning to the number. pr_agent/algo/init.py [48-52] -'vertex_ai/gemini-2.0-flash': 1048576, -'gemini/gemini-2.0-flash': 1048576, +GEMINI_FLASH_CONTEXT_SIZE = 1048576 # 1M tokens +# In the dictionary: +'vertex_ai/gemini-2.0-flash': GEMINI_FLASH_CONTEXT_SIZE, +'gemini/gemini-2.0-flash': GEMINI_FLASH_CONTEXT_SIZE, + Apply this suggestion Suggestion importance[1-10]: 6	Low

• Author self-review: I have reviewed the PR code suggestions, and addressed the relevant ones.