fix(cache): skip expired sqlite vary entries during lookup

[trivikr]

This relates to...

Fixes: #5094

Rationale

SqliteCacheStore#findValue() iterates rows ordered by deleteAt ASC. If the first candidate is expired, it returned undefined immediately instead of continuing to scan later candidates. That makes lookups incorrect for URLs with multiple Vary variants.

Changes

Change SqliteCacheStore#findValue() to skip expired rows during lookup instead of aborting the scan.

Features

N/A

Bug Fixes

Fix SqliteCacheStore#get() returning a cache miss when an earlier expired Vary variant precedes a later valid variant for the same URL/method.

Breaking Changes and Deprecations

N/A

Status

• I have read and agreed to the Developer's Certificate of Origin
• Tested
• Benchmarked (optional)
• Documented
• Review ready
• In review
• Merge ready

Assisted-by: openai:gpt-5.4

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.13%. Comparing base (2a6f9c7) to head (aa26a17).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5095   +/-   ##
=======================================
  Coverage   93.13%   93.13%           
=======================================
  Files         110      110           
  Lines       35816    35816           
=======================================
+ Hits        33356    33358    +2     
+ Misses       2460     2458    -2     

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[mcollina]

lgtm