Encode escapeuri byte by byte so it resolves under --trim

[asinghvi17]

escapeuri(::AbstractString, ::Function) builds its result with join over a generator, which routes through Base.AnnotatedString — a path --trim cannot resolve. One call to escapeuri on a String fails a juliac --experimental --trim=safe build with 20 verifier errors.

A byte loop appending to a Vector{UInt8} does the same job and resolves.

Measured on Julia 1.12.7:

• Output is identical. 1,202,368 comparisons against the v1.7.0 implementation, zero mismatches.

• Verifier errors 20 → 0. A @main calling escapeuri("hello world/foo?a=1&b=ü") now builds with juliac --output-exe --experimental --trim=safe and prints the right answer; so do programs calling escapepath and a custom predicate.

• Tests pass, 304/304, including two new assertions for the safe argument, which had none.

• Faster (@btime):

  input	v1.7.0	here
  205-byte query string	4.97 µs, 16.1 KiB	796 ns, 1.25 KiB
  88-byte path via escapepath	979 ns, 448 B	345 ns, 256 B
  "hello world"	291 ns, 592 B	56 ns, 176 B

Made by Claude

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.02%. Comparing base (859a10c) to head (bb3eb3d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #77      +/-   ##
==========================================
+ Coverage   86.91%   87.02%   +0.11%     
==========================================
  Files           5        5              
  Lines         382      393      +11     
==========================================
+ Hits          332      342      +10     
- Misses         50       51       +1     

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