* test: list the slowest tests on request and stop waiting 30 s on a held WAL (#487)
PM_TEST_SLOWEST=N makes tests/run_suite.py list the N slowest tests.
Three history tests restored while their own read held a snapshot, so
each publish sat out the 30 s WAL-truncate wait; they now use a short wait.
Temporary diagnostics for the Windows timings ride along in this commit.
* test(lora): check Windows folder rules without asking the network (#487)
On Windows ntpath.realpath looks up \\server\share and waited about 2.8 s
per test for a host that does not exist. The guard tests now use the
lexical NT path rules, which is what they already ran on Linux and macOS.
* ci(portability): keep Windows test files on the work disk (#487)
The Windows runner's TEMP is on C:, where a flush took about 6 ms and a test
database's create-to-delete about 111 ms; on D: the same took 0.5 ms and
23 ms. The job now points TEMP/TMP at RUNNER_TEMP and lists the 40 slowest
tests. The fake HTTPS handlers get a TLS context that reads no certificate
store, and the missing-share tests name localhost instead of an unknown
server. The temporary diagnostics are removed.
* ci(portability): spell the Windows test TEMP by its short name (#487)
The runner's own TEMP was C:\Users\RUNNER~1\..., so tests met 8.3 short
names in every temp path. The folder on D: keeps that when the disk has
short names, and the step logs which spelling it got. TESTING.md notes
that the slowest list is not printed when a job is cancelled.
* ci(portability): switch on 8.3 names for the Windows test TEMP (#487)
D: made no short names (run 40922502209 logged the long spelling), so
the step now switches them on for D: before it creates the folder, and
warns when the folder still has no short name.