fix: re-create session should skip rewrite messages

[darkskygit]

No description provided.

[nx-cloud]

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✅ Successfully ran 6 targets

• nx test:coverage @affine/monorepo
• nx build @affine/storage -- --target x86_64-unknown-linux-gnu --use-napi-cross
• nx build @affine/native -- --target x86_64-pc-windows-msvc --use-napi-cross
• nx build @affine/native -- --target x86_64-unknown-linux-gnu --use-napi-cross
• nx build @affine/native -- --target x86_64-apple-darwin --use-napi-cross
• nx build @affine/native -- --target aarch64-apple-darwin --use-napi-cross

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[codecov]

Codecov Report

Attention: Patch coverage is 18.18182% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 61.59%. Comparing base (5cd4c05) to head (5fe1a0a).

Files	Patch %	Lines
...ages/backend/server/src/plugins/copilot/session.ts	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #6513      +/-   ##
==========================================
- Coverage   61.61%   61.59%   -0.03%     
==========================================
  Files         526      526              
  Lines       25877    25877              
  Branches     2326     2326              
==========================================
- Hits        15945    15939       -6     
- Misses       9659     9664       +5     
- Partials      273      274       +1     

Flag	Coverage Δ
server-test	71.64% <18.18%> (ø)
unittest	38.80% <ø> (ø)

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