fix: implement retry logic for socket hang up errors in HTTP requests

[amitsingh05667]

###Summary

• Fixes "Socket hang up" not handled by Retry configuration #1020 — socket hang up (ECONNRESET) errors were not being retried even when retry was enabled
• The retry logic previously only handled HTTP status codes (e.g. 429); network-level errors thrown before any response arrived bypassed it entirely
• Added a try/catch around the fetch call in src/lib/retry.ts so network errors are now retried with the same exponential backoff logic as status code retries
• TimeoutError is explicitly excluded from retries - a timeout is intentional and should not be retried

Changes

• src/lib/retry.ts - wrap action() in try/catch; catch and retry network errors, rethrow TimeoutError
• tests/lib/runtime.test.ts - 3 new tests covering the fix

Test plan

• Retries on ECONNRESET and recovers when server becomes available within maxRetries
• Throws after exhausting all retries on repeated socket hang up
• Does not retry when retry: { enabled: false }
• Timeout errors are still not retried
• All existing 4192 tests continue to pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.43%. Comparing base (97a4419) to head (813295b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1324      +/-   ##
==========================================
+ Coverage   89.42%   89.43%   +0.01%     
==========================================
  Files         384      384              
  Lines       18246    18255       +9     
  Branches     9047     8712     -335     
==========================================
+ Hits        16316    16326      +10     
+ Misses       1926     1925       -1     
  Partials        4        4              

Flag	Coverage Δ
alltests	89.43% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/lib/retry.ts	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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