Merge latest trunk enhancements and fixes into the experimental

flex-search branch.

FossilOrigin-Name: 51c89c886f1846e297d249c85d18b047c76ba352ed998e48220e96a6a567b4a8

diff --cc manifest
index ac7286238a3201c0512201fdbb4f3f6c821fcf8a,bc123ab3c44372d08f6758764f3d456e2ba8878e..49b2fefdb24f1bfccdf2057088fe7f85e4c3d32e
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Initial\simplementation\sof\ssqlite3BtreeEstimatedPosition()\swith\sthe\nest_rank()\sSQL\sfunction\sused\sfor\stesting.
- D 2025-06-09T16:32:26.471
 -C Have\ssqlite3_setlk_timeout()\stake\sthe\sdatabase\shandle\smutex.\sThis\sfixes\san\sassert()\sfailure\sthat\scould\soccur\sif\ssqlite3_setlk_timeout()\swere\scalled\son\sa\sthreadsafe\shandle.
 -D 2025-06-12T07:35:38.259
++C Merge\slatest\strunk\senhancements\sand\sfixes\sinto\sthe\sexperimental\nflex-search\sbranch.
++D 2025-06-12T13:40:29.659
  F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@@ -724,10 -724,10 +724,10 @@@ F src/analyze.c 03bcfc083fc0cccaa9ded93
  F src/attach.c 9af61b63b10ee702b1594ecd24fb8cea0839cfdb6addee52fba26fa879f5db9d
  F src/auth.c 54ab9c6c5803b47c0d45b76ce27eff22a03b4b1f767c5945a3a4eb13aa4c78dc
  F src/backup.c 5c97e8023aab1ce14a42387eb3ae00ba5a0644569e3476f38661fa6f824c3523
- F src/bitvec.c 782cc29b42b47e7ec6348eb0aaf9ffe60063f498387e7249f458d445af4b53e9
+ F src/bitvec.c e242d4496774dfc88fa278177dd23b607dce369ccafb3f61b41638eea2c9b399
  F src/btmutex.c 30dada73a819a1ef5b7583786370dce1842e12e1ad941e4d05ac29695528daea
 -F src/btree.c 53a9c7b243e94c992853d90f1dac0959028433b4b0d27e04409cee04e001b508
 -F src/btree.h 18e5e7b2124c23426a283523e5f31a4bff029131b795bb82391f9d2f3136fc50
 +F src/btree.c fe36ce9242cca45b6c313c2dbd07674ff64328cb02d4ea2623f95567306b5cf7
 +F src/btree.h 70f5f4a2c4767fcada25a94c8ac1fbada4b416e3b18be48a4a090c3a5314505c
  F src/btreeInt.h 9c0f9ea5c9b5f4dcaea18111d43efe95f2ac276cd86d770dce10fd99ccc93886
  F src/build.c 67c1db4c5e89a8519fe9b6dafc287f6bc3627696b5b8536dc5e06db570d8c05f
  F src/callback.c acae8c8dddda41ee85cfdf19b926eefe830f371069f8aadca3aa39adf5b1c859
@@@ -736,10 -736,10 +736,10 @@@ F src/date.c 9db4d604e699a73e10b8e85a44
  F src/dbpage.c b3e218f8ed74fcbb7fa805df8ca669a3718d397617b3d8a8aac3307dc315c4d6
  F src/dbstat.c 73362c0df0f40ad5523a6f5501224959d0976757b511299bf892313e79d14f5c
  F src/delete.c 03a77ba20e54f0f42ebd8eddf15411ed6bdb06a2c472ac4b6b336521bf7cea42
 -F src/expr.c f16fa5cbd849991462edf1d31bb7def5b970bb9611afcb4ea21c77e88e52a220
 +F src/expr.c 083f478563cfa0163a8b7a2f5c8d74a45197e02f95cf3d61f0cde67578aa8996
  F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
  F src/fkey.c 928ed2517e8732113d2b9821aa37af639688d752f4ea9ac6e0e393d713eeb76f
- F src/func.c 19aa22584be26b56aa13e46a0a2078f49bc33036c93ed24e6a05578c3b7a049b
 -F src/func.c de47a8295503aa130baae5e6d9868ecf4f7c4dbffa65d83ad1f70bdbac0ee2d6
++F src/func.c adbb40155039b23cf6238a023eb1896920c65ed3a3535669f6a73c6914ac597d
  F src/global.c a19e4b1ca1335f560e9560e590fc13081e21f670643367f99cb9e8f9dc7d615b
  F src/hash.c 73934a7f7ab1cb110614a9388cb516893b0cf5b7b69e4fd1a0780ac4ce166be7
  F src/hash.h 46b92795a95bfefb210f52f0c316e9d7cdbcdd7e7fcfb0d8be796d3a5767cddf
@@@ -790,7 -790,7 +790,7 @@@ F src/shell.c.in 4ae9ff8e8b23d9a309e50d
  F src/sqlite.h.in 22882ddd3a70751aa8864c81993ee4562ed54c2c508b6270f75e223ffee38e1b
  F src/sqlite3.rc 015537e6ac1eec6c7050e17b616c2ffe6f70fca241835a84a4f0d5937383c479
  F src/sqlite3ext.h 0bfd049bb2088cc44c2ad54f2079d1c6e43091a4e1ce8868779b75f6c1484f1e
- F src/sqliteInt.h e1d940cfbb12f267405b8fe40d1c515202f89b5795579644b20366891f40522b
 -F src/sqliteInt.h 5f190640c1939960f993c07d0e626fb2acc40d42ac12b21811dd6c069fb71db4
++F src/sqliteInt.h b3338c0ced9fa0191f849cb81384965e724bd9c850777d2bd3e47d5fb8d7b012
  F src/sqliteLimit.h 6d817c28a8f19af95e6f4921933b7fbbca48a962bce0eb0ec81e8bb3ef38e68b
  F src/status.c 0e72e4f6be6ccfde2488eb63210297e75f569f3ce9920f6c3d77590ec6ce5ffd
  F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@@ -2208,8 -2208,8 +2208,8 @@@ F tool/version-info.c 3b36468a90faf1bbd
  F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
  F tool/warnings.sh 1ad0169b022b280bcaaf94a7fa231591be96b514230ab5c98fbf15cd7df842dd
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 87fd19925752b52c767e1202f297a8ec24a6a9ab3d741b6af216b6ad5abd59d5
- R c2dcdf08cc3767193965f9116e1dbf68
 -P badf3014bd1620fd3d4b8013f641fd820b249649fb93cc75b7b8df9dfd6f32a6
 -R 7fdf393495e0e2303824909fb18b2ec1
 -U dan
 -Z 94b5809cfbb11f003ae05c3735568843
++P e93048425bb7183efc047d0f6b39f214491fee869b8ed8006c6ec6eb0e3ec417 a95d126e1330e1b83f42b51f97c4c216622cf38062f3b5d72ccb76313187e850
++R 8746ac21dac213bf45ceade3f4ad3e82
 +U drh
- Z 171140a59391c713fdc23831152d7994
++Z be1dd962742be330d7e4cccb4f2618fb
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 8ca92cb795df92a4c2ead07b1011e7859355dd5f,1b41af25f6514b467ca789a8cec4d62556f4c910..91d577cafac7579fa624ea8008dd1ac6aab6334d
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- e93048425bb7183efc047d0f6b39f214491fee869b8ed8006c6ec6eb0e3ec417
 -a95d126e1330e1b83f42b51f97c4c216622cf38062f3b5d72ccb76313187e850
++51c89c886f1846e297d249c85d18b047c76ba352ed998e48220e96a6a567b4a8

diff --cc src/func.c
Simple merge

diff --cc src/sqliteInt.h
Simple merge