fix(compress): convert strong ETag to weak ETag when compressing

[usualoma]

fixes #4845

Convert strong ETag to weak ETag (W/ prefix) when the compress middleware compresses the response.

The author should do the following, if applicable

• Add tests
• Run tests
• bun run format:fix && bun run lint:fix to format the code

[github-actions]

Bundle size check

	main (018277e)	#4848 (35ae980)	+/-
Bundle Size (B)	18,489B	18,489B	0B
Bundle Size (KB)	18.06K	18.06K	0K

Compiler Diagnostics (tsc)

	main (018277e)	#4848 (35ae980)	+/-
Files	229	229	0
Lines	146,731	146,731	0
Identifiers	124,420	124,420	0
Symbols	150,583	150,583	0
Types	157,112	157,112	0
Instantiations	401,446	401,446	0
Memory used	252,815K	251,347K	-1,468K
I/O read	0.03s	0.04s	0.01s
I/O write	0s	0s	0s
Parse time	0.72s	0.7s	-0.02s
Bind time	0.28s	0.28s	0s
Check time	1.46s	1.44s	-0.02s
Emit time	0.01s	0.01s	0s
Total time	2.47s	2.43s	-0.04s

Compiler Diagnostics (typescript-go)

	main (018277e)	#4848 (35ae980)	+/-
Files	229	229	0
Lines	150,912	150,912	0
Identifiers	125,098	125,098	0
Symbols	190,886	190,886	0
Types	255,496	255,496	0
Instantiations	608,997	608,997	0
Memory used	162,050K	162,075K	25K
Memory allocs	1,767,620	1,767,772	152
Config time	0.001s	0.001s	0s
BuildInfo read time	0.001s	0.001s	0s
Parse time	0.094s	0.101s	0.007s
Bind time	0s	0s	0s
Check time	0.447s	0.425s	-0.022s
Emit time	0.005s	0.008s	0.003s
Changes compute time	0.026s	0.022s	-0.004s
Total time	0.611s	0.589s	-0.022s

---

Reported by octocov

[github-actions]

HTTP Performance Benchmark

Framework	Runtime	Average	Ping	Query	Body
hono (origin/main)	bun	35,478.73	49,726.74	31,694.41	25,015.05
hono (current)	bun	35,519.17	49,887.21	31,961.05	24,709.25
Change		+0.11%	+0.32%	+0.84%	-1.22%

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.84%. Comparing base (018277e) to head (5f30eab).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4848   +/-   ##
=======================================
  Coverage   92.84%   92.84%           
=======================================
  Files         177      177           
  Lines       11643    11647    +4     
  Branches     3468     3469    +1     
=======================================
+ Hits        10810    10814    +4     
  Misses        832      832           
  Partials        1        1           

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[usualoma]

@sebastian-nowak's suggestion makes sense, and I think we should address it.

[usualoma]

Hi @yusukebe,
Would you mind reviewing this?

[yusukebe]

LGTM!

[yusukebe]

@usualoma

I see! The issue should be fixed. Thanks.