Ensure that if sqlite3_snapshot_get() is called immediately after a "BEGIN", then...

FossilOrigin-Name: eb5277e490a9b48c865f2dc449cdb8f1b604e233737e492abb4f2f7101a6715b

diff --cc manifest
index ac49e358bf3c1b75919ec0869f6c17dc0b48e0c5,af70783701f8cc0987f29d0cf1b4fe4bb83f7da3..93554f41ad52546f6dbc49013d79f2b306c43eee
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C New\s#ifdefs\sto\somit\scode\sthat\sis\sunused\swhen\sSQLITE_USE_LONG\sDOUBLE\sis\sdefined.
- D 2024-10-01T19:10:47.855
 -C Merge\slatest\strunk\schanges\sinto\sthis\sbranch.
 -D 2024-10-02T11:11:29.802
++C Ensure\sthat\sif\ssqlite3_snapshot_get()\sis\scalled\simmediately\safter\sa\s"BEGIN",\sthen\sit\slocks\sthe\sdatabase\ssuch\sthat\sthe\sreturned\ssnapshot\sobject\smay\snot\sbe\sinvalidated\sby\sa\swriter\sor\scheckpointer\suntil\safter\sthe\ssqlite3_snapshot_get()\scaller\shas\sclosed\sits\stransaction.
++D 2024-10-02T11:15:22.731
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2213,8 -2213,8 +2213,9 @@@ F vsixtest/vsixtest.tcl 6195aba1f12a5e1
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 1755831cb1ac58241e0b11d8d003b5eca39b65aa3cb84229b215662028b1b3c0
- R aec30d14f5d302123caffa8ac548b88e
- U drh
- Z 3d8c02a9a1123f16b58018bc4d458ba9
 -P 78c3892ab777a39406da8a9df84d0634397514e25512b0363a13bff3b8bc8925 98066e2d226e7d2eceec1931a1432baea956f49bf3c708d8a6d511fa4e864ca3
++P 98066e2d226e7d2eceec1931a1432baea956f49bf3c708d8a6d511fa4e864ca3 2b3945e6a597e6853cac567052e92926c8cb6d7a029ac64c2d45c321bbe2e94d
+ R 87b444cea9d9fafaf3e9a749b30c4a0d
++T +closed 2b3945e6a597e6853cac567052e92926c8cb6d7a029ac64c2d45c321bbe2e94d
+ U dan
 -Z 8747e077fd17f2f82bf023df0407bc7e
++Z 6129c11744c8e74c24fcca7210cf60cf
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 19cf9165e2b2eae755ad218345d208400fdffb8d,f4fe018f5683a9ff9ab885e0bb27309f6d1e8ff6..f01601d1c5bc5438a920d08cb990051e95c33f42
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 98066e2d226e7d2eceec1931a1432baea956f49bf3c708d8a6d511fa4e864ca3
 -2b3945e6a597e6853cac567052e92926c8cb6d7a029ac64c2d45c321bbe2e94d
++eb5277e490a9b48c865f2dc449cdb8f1b604e233737e492abb4f2f7101a6715b