Auto set logging filter (#8051)

We do this to prevent foot guns. The default config uses a MemoryFilter,
but users are free to change to logging to files directly. If they do
then they have to ensure to set the `filters: [context]` on the right
handler, otherwise records get written with the wrong context.

Instead we move the logic to happen when we generate a record, which is
when we *log* rather than *handle*.

(It's possible to add filters to loggers in the config, however they
don't apply to descendant loggers and so they have to be manually set on
*every* logger used in the code base)

1 files changed, 1 insertions, 0 deletions

diff --git a/changelog.d/8051.misc b/changelog.d/8051.misc
new file mode 100644
index 0000000000..9e472cd481
--- /dev/null
+++ b/changelog.d/8051.misc
@@ -0,0 +1 @@
+It is no longer necessary to explicitly define `filters` in the logging configuration. (Continuing to do so is redundant but harmless.)