Rewrite TODO.md sentence by sentence

Rewritten from scratch against the code on next; the sections and
their contents are kept.

Model: fable-5-1

TODO.md

@@ -14,7 +14,7 @@ Nothing stays local-only: every commit is pushed.
 
 `next` is the branch for the next milestone. It must stay green and mergeable
 into `main` at all times. A milestone's work reaches `main` through one PR from
-`next`, which the owner, @sneak, merges. Cutting a release from `main` is a
+`next`. The owner, @sneak, merges that PR. Cutting a release from `main` is a
 separate step after that.
 
 The tracker (https://git.eeqj.de/sneak/webhooker/issues) records what is done
@@ -59,16 +59,16 @@ tag.
   It lasts up to 7 days. It ends sooner after `SESSION_IDLE_TIMEOUT` (default 24
   hours) without use.
 - Password reset over the web for a forgotten password. Today a signed-in user
-  can change their password. A lost password is reset from the console with
+  can change their password. A lost password is reset from the command line with
   `webhooker resetpw` (https://git.eeqj.de/sneak/webhooker/issues/208).
 - Later, nice to have
     - email delivery target type
     - SNS and S3 delivery targets
     - data transformations, such as a configurable Slack message format. The
       Slack target sends one fixed format today.
-    - JSONL file delivery with periodic S3 upload. Today the `database` target
+    - JSONL file delivery with periodic S3 upload. Today an archive target
-      archives events to SQLite files. A target can rotate those files hourly,
+      writes events to SQLite files. An archive target can rotate those files
-      daily or monthly. The webhook page offers them as one gzipped JSON
+      hourly, daily or monthly. The webhook page offers them as one gzipped JSON
       download.
     - webhook event search, and filtering beyond the event log's failed and
       pending views