Enhance query planning so that it check for sqlite3_interrupt() calls and

periodically invokes the progress handler callback (if any) during long
query analyses.

FossilOrigin-Name: bd8fa10e59f58886e10c84ea9934fa1b5f491aac2eff302757a76d2d36d59b69

diff --cc manifest
index cdb56994ed860e971163e827fb7210d731c7cf35,cd5ebeaef3f81d085abd8b974d5e22d01f70c579..071177a7fa782c25fcbaeb3a9f825ef67367d1e8
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Do\snot\sattempt\sto\srun\snew\stest\sfile\srbupass.test\sif\sthe\s"demo"\sVFS\sis\snot\savailable.
- D 2023-01-12T19:28:34.870
 -C Update\sdocumentation\sfor\ssqlite3_progress_handler().
 -D 2023-01-13T15:31:24.311
++C Enhance\squery\splanning\sso\sthat\sit\scheck\sfor\ssqlite3_interrupt()\scalls\sand\nperiodically\sinvokes\sthe\sprogress\shandler\scallback\s(if\sany)\sduring\slong\nquery\sanalyses.
++D 2023-01-13T15:54:25.723
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2069,8 -2068,8 +2069,9 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
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  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 6a306961eacb8560905258ff6184e5c36d7411d9,4d53a24a4c3da9b124246308bc803aa8e5b0bef4..25ba762e5f82b8e2c91b7fd0b330ed94769f48a4
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
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 -41b4c407b7f6968f4493fb9a0b220c55a6f6a353a8e6cb054efd3eb01bdd11dc
++bd8fa10e59f58886e10c84ea9934fa1b5f491aac2eff302757a76d2d36d59b69