Updates to where.c to handle vtabs in joins more similarly to regular tables.

FossilOrigin-Name: 9138223013505d3e0f1f2b40b51d521184aabd50732fdf4f6bed393cfa9475fc

diff --cc manifest
index 6b9e94a1e52360e1c38c62606ee9c2bb65b8d7ca,4636f4e6333dce57a9b635d89698df2fe0b06b84..d389cbd3324cbbcfeada5741e4a0597a011662c4
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Diverse\sinternal\scleanups\sin\sthe\sJS/WASM\spieces.\sA\spotential\sfix\sfor\sa\shypothetical\sdb-close-time\sresource\sleak\sof\sa\ssubset\sof\sautomated\sJS-to-WASM\sfunction\sconversions\sin\sSafari.\sThat\sbrowser\sexposes\sWASM-exported\sfunctions\svia\snullary\swrappers,\swhich\scauses\sa\shandful\sof\sthem\sto\smisbehave\s(not\sclean\sup)\sat\ssqlite3_close_v2()-time.
- D 2025-09-15T14:11:55.851
 -C Merge\slatest\strunk\swith\sthis\sbranch.
 -D 2025-09-15T16:09:54.717
++C Updates\sto\swhere.c\sto\shandle\svtabs\sin\sjoins\smore\ssimilarly\sto\sregular\stables.
++D 2025-09-15T17:06:35.698
  F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@@ -2174,8 -2175,8 +2175,9 @@@ F tool/version-info.c 3b36468a90faf1bbd
  F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
  F tool/warnings.sh 1ad0169b022b280bcaaf94a7fa231591be96b514230ab5c98fbf15cd7df842dd
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 292866a46948e8d707bd14864fd1b40eec1bd2e22dcd249ec94711b646c8a70b
- R 3d648bd2f0581cd393c02110c0b966eb
- U stephan
- Z cb971779c9e9efb3d18793a17a591051
 -P 991383262b0d07ebc79fdb6bed448013cea3a0ac13292d5397dce012b1e6a673 fabbc8b6d184d52a513e80fabd900f578424fc8a8055e3d64fac54b9e28ea18a
++P fabbc8b6d184d52a513e80fabd900f578424fc8a8055e3d64fac54b9e28ea18a 0bb8c42951ed4fcda60f195b9cc84c80d5b8c0ff77c7517243708f43ba09cfdd
+ R 9502f6e7264c20624ab1f1c21d99c7f4
++T +closed 0bb8c42951ed4fcda60f195b9cc84c80d5b8c0ff77c7517243708f43ba09cfdd
+ U dan
 -Z 08204eb82ab90bdace0e9da74500c44d
++Z 939227077ed9365e5216a5e46be0b58b
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 76e48d8148ad93f52c960057598b5b30b9daae51,a406a0353d50a2ff90f64f67ee5d5d24d821970e..b4eb337fbbe2c33f19fb602058eec0604379d4b6
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- fabbc8b6d184d52a513e80fabd900f578424fc8a8055e3d64fac54b9e28ea18a
 -0bb8c42951ed4fcda60f195b9cc84c80d5b8c0ff77c7517243708f43ba09cfdd
++9138223013505d3e0f1f2b40b51d521184aabd50732fdf4f6bed393cfa9475fc