Log messages are lower-case event names with their details as key/value
attributes ("error" for errors), in place of formatted strings.
Loggable package take a WithLogger option as part of their "New*" call,
defaulting to slog.Default(). Each tags its lines with its `component`.
Some debug loggers print directly rather than using slog when in
terminal logging mode.
gci is configured with the sections standard, default and localmodule, and
goimports with the module path as its local prefix, so both formatters
agree.
- logging: LogToFile shadowed the package-level fileLogger, so
IsFileLogger was always false and Shutdown never closed the file
- logging: replace IsJSONHandler's unsafe reflection into slog
internals with a *slog.JSONHandler type check
- cli: fail if the log file can't be opened instead of silently
logging to the terminal; return the log shutdown error from Finish
- build.sh: -X flags used the wrong module path, so the version, build
time and commit were never stamped
bwilliams