Fix RecursionError when parsing JSON with mismatched brackets in numeric values

[lucemia]

When a number was followed by a closing bracket that didn't match the current
stack (e.g., } when [ was on the stack), state_int/state_double/
state_exponent_digits would assert and fail. This error propagated back to
state_value_string which entered an infinite escape-retry loop causing
RecursionError. Fix by delegating mismatched bracket handling to
state_post_value which already handles inserting the missing bracket.

Fixes #275

https://claude.ai/code/session_01A8edoMzYi4cKTh5afKXDaC

[codecov-commenter]

Codecov Report

❌ Patch coverage is 72.22222% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.65%. Comparing base (a24aaac) to head (57144a6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fuzzy_json/decoder.py	72.22%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #277      +/-   ##
==========================================
- Coverage   90.17%   88.65%   -1.52%     
==========================================
  Files           3        3              
  Lines         285      291       +6     
==========================================
+ Hits          257      258       +1     
- Misses         28       33       +5     

Flag	Coverage Δ
3.10	88.65% <72.22%> (-1.52%)	⬇️
3.11	88.65% <72.22%> (-1.52%)	⬇️
3.12	88.65% <72.22%> (-1.52%)	⬇️
3.13	88.65% <72.22%> (-1.52%)	⬇️

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