docs(tasks): record v3.3.108 session-log 6-digit suffix release

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tasks/todo.md

@@ -1,3 +1,17 @@
+# v3.3.108 — session log filename: 6-digit uniqueness suffix
+
+User: append a generated 6-digit number to the session log filename, e.g.
+26-06-2026-mdu-session-06-02-847581.log. Dropping seconds/pid in v3.3.107 reintroduced same-minute
+collision risk on a fast close/reopen.
+- formatSessionStamp(date, rand) appends `-${rand}` when rand is supplied (number or string), else unchanged.
+- main.js stamps SESSION_ID = formatSessionStamp(new Date(), String(Math.floor(100000 + Math.random()*900000))).
+- stripModeStampFromFileName newSessionRe gains an optional `(?:-\d+)?` so the suffix strips back to the base.
+- Tests: stamp-with-rand (string + number), strip-with-suffix. 411 pass.
+Shipped: gitea v3.3.108 (updater latest.yml verified) + GitHub mirror (lib/log-mode.js, main.js, package.json,
+tests/log-mode.test.js only; tag repointed to the sanitized mirror commit, NOT the gitea history commit).
+
+---
+
 # v3.3.107 — session log filename template → DD-MM-YYYY-mdu-session-HH-MM
 
 User: change the session log filename from fileuploader-session-YYYY-MM-DD_HH-MM-SS-<pid>.log to