Keep only open work in docs/TODO.md (closes #23)

Drop the Completed Steps log and the description of what main already
does from Status. The open lint-config step and the Workflow section
stay unchanged.

Model: opus-5-5

docs/TODO.md

@@ -10,12 +10,8 @@
 
 # Status
 
-pre-1.0. No git tags exist. `main` is a working bot: one container image
-holding the bot and the SimpleX Chat command-line client v7.0.2, a bot
-profile named `calc` with a long-term address that accepts every contact
-request, and exact arithmetic replies (`+ - * /`, parentheses,
-decimals). The Gitea issue tracker is the authoritative list of work;
-this file mirrors it.
+pre-1.0. The Gitea issue tracker is the authoritative list of work; this
+file mirrors it.
 
 # Next Step
 
@@ -25,35 +21,6 @@ warns on every run that `gomodguard` is deprecated. The file is
 maintained upstream and is not edited here; done when `make lint` runs
 with no deprecation warning.
 
-# Completed Steps
-
-- 2026-10-02 A plain `docker build .` of a clone stamps the commit's tag
-  or short commit instead of `dev`: `.dockerignore` sends `.git` without
-  `.git/config`, and the build stage takes the `VERSION` build argument
-  when given, otherwise `git describe --tags --always`
-- 2026-09-29 Exact results past the range of a double, such as `2^1200`,
-  are written to 17 significant digits instead of being refused, and a
-  fractional power of such a number, such as `(2^1200)^0.5`, is answered
-- 2026-09-29 Each new incoming message is posted to its chat's webhooks
-- 2026-09-29 `POST`, `GET` and `DELETE` on a chat's webhooks, under
-  `/api/v1/chats/{id}/webhooks`, kept in `$DATA_DIR/webhooks.json`
-- 2026-09-29 `GET` and `POST /api/v1/chats/{id}/messages`: a chat's
-  latest messages, and sending one
-- 2026-09-29 Added the HTTP API in `internal/api`: the server on `PORT`,
-  the bearer credential from `API_TOKEN_FILE`, security headers and
-  limits, and `GET /api/v1/chats`
-- 2026-09-28 Powers (`^`, also written `**`) and remainders (`%`) in
-  `internal/calc`, which now reads expressions with a parser of its own
-  in place of `go/parser`
-- 2026-09-28 Moved the command tree and the `run` and `version` commands
-  from `cmd/simplexcalc/` into `internal/cli`; `cmd/simplexcalc/main.go`
-  is now a single call to `cli.Main`
-- 2026-09-26 Seeded from `go-template-repo` (renamed, its HTTP service
-  removed) and built the bot: `internal/calc` for the arithmetic,
-  `internal/simplex` for the chat client process and its WebSocket API,
-  `internal/bot` for address setup and replies, and a runtime image on
-  Ubuntu 22.04 carrying the checksum-verified `simplex-chat` binary
-
 # Future Steps
 
 none