Fix: Add Callback Events and Align Hooks in Streaming Loop

[bhimrazy]

What does this PR do?

• Adds missing before and after callback events for encoding responses in the streaming loop.
• Also aligns the hooks (after_predict > after_encode_response) and ensures they run only after the generator completes.
  • This ensures that the after hooks are executed only once the generator finishes processing all tasks.

PR review

Anyone in the community is free to review the PR once the tests have passed.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90%. Comparing base (5aef366) to head (37679c4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #407   +/-   ##
===================================
  Coverage    89%    90%           
===================================
  Files        31     31           
  Lines      2017   2020    +3     
===================================
+ Hits       1804   1811    +7     
+ Misses      213    209    -4     

[aniketmaurya]

Looks great @bhimrazy! let's goo 🚀