sqlite: persist enableDefensive() across reopen

[trivikr]

Fixes: #66403

enableDefensive() updated only the live connection, so after close() and open() the defensive flag went back to the value passed to the constructor.

Store the new value in the open configuration so that open() applies it again.

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Assisted-by: claude:opus-5.5

[nodejs-github-bot]

Review requested:

• @nodejs/sqlite

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.39%. Comparing base (f71d644) to head (c75a527).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #66404      +/-   ##
==========================================
+ Coverage   90.36%   90.39%   +0.02%     
==========================================
  Files         792      792              
  Lines      275564   275565       +1     
  Branches    52832    52829       -3     
==========================================
+ Hits       249016   249084      +68     
+ Misses      16965    16911      -54     
+ Partials     9583     9570      -13     

Files with missing lines	Coverage Δ
src/node_sqlite.cc	81.98% <100.00%> (+0.06%)	⬆️

... and 37 files with indirect coverage changes

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