fix(hachidori): keep the hachidori tag alongside SubMiner's Anki tags

- Untouched default templates now get configured tags plus `hachidori` instead of replacing it
- Tags edited in Hachidori settings are left as written
- Update Anki integration docs and changelog fragment

changes/hachidori-backend.md

@@ -4,7 +4,7 @@ area: dictionary
 - Added a bundled Hachidori dictionary backend alongside the default Yomitan backend. Select it with `dictionaryBackend` and restart SubMiner.
 - The tray and dictionary-settings shortcut follow the selected backend. `--hachidori` opens Hachidori settings, while `--yomitan` opens Yomitan settings unless a read-only external Yomitan profile is configured. This restriction also applies with Hachidori active, without blocking Hachidori settings.
 - Hachidori integrates with subtitle scanning, popup controls, lookup tracking, character dictionaries, and Anki media enrichment, with separate dictionaries and settings for each backend. Character dictionaries reach a linked host over the link (Hachidori 0.2.3 or later, or a current Docker host), retry busy imports, and replace the previous dictionary only after a successful import. Older hosts report where to import the dictionary manually.
-- Hachidori auto-populates its first Anki template from SubMiner's deck, tags, and field mappings, detects an unambiguous matching note type, and preserves existing custom templates apart from the deck, which follows `ankiConnect.deck` so polling mode enriches Hachidori cards. Anki discovery retries after an unavailable connection.
+- Hachidori auto-populates its first Anki template from SubMiner's deck, tags (kept alongside its own `hachidori` tag), and field mappings, detects an unambiguous matching note type, and preserves existing custom templates apart from the deck, which follows `ankiConnect.deck` so polling mode enriches Hachidori cards. Anki discovery retries after an unavailable connection.
 - Hachidori saves downloadable word audio before sending a note through SubMiner's Anki proxy, so freshly mined animated cards include the word-audio delay.
 - Both bundled dictionary backends reload their background code on startup so extension updates take effect while preserving installed dictionaries and settings. Failed Yomitan connection-setting updates can be retried without manually resetting the managed Anki endpoint.
 - First-run setup remembers each backend that finished it, including when reopened for legacy plugin cleanup, so switching back does not repeat setup, and the launcher gates playback on the backend the running app started with. Current incomplete or cancelled setup takes precedence over stale completion history. A running Yomitan session keeps using its external profile until it restarts into Hachidori.