fix(formatters): localize PR buttons, cap oversized content, dedupe status logic

- PR merge/close button labels now follow the group language (actions.merge/close)
  instead of hardcoded Chinese
- clamp content to Discord embed limits (title 256, description 4096, field value
  1024, 25 fields) in formatters plus a render-layer safety net; Telegram gets a
  tag-safe 4096-char cap (capHtml closes dangling tags)
- raise commit subject truncation from 72 to 200 chars (MAX_COMMIT_SUBJECT)
- extract workflowStatus/workflowRunStatus/statusColorKey helpers shared by
  check_run/check_suite/workflow_run/workflow_job
- dedupe deployment ref/sha fields via addDeploymentRefFields
- commit_comment without a commit id uses title_plain (no dangling ???????)
- tag pushes now report 'Tag created'; zh push title includes the {ref}
- sender profile link derives from the repo's forge origin instead of github.com
- group webhook log emoji injected via emojiPrefix, removed from locale files
- dispatchEvent accepts preloaded groups (single KV read per webhook)
- webhook 401 logs distinguish 'secret not configured' from 'invalid signature'

AGENTS.md

@@ -155,6 +155,10 @@ tests/                   # bun test unit tests (webhook, formatter, discord, tel
   (`commitLink`/`branchLink`/`tagLink` helpers in `server/lib/formatters/helpers.ts`, e.g.
   ``[`abc123d`](https://.../commit/abc123def456)``, ``[`main`](https://.../tree/main)``),
   falling back to plain inline code when the repo base URL is unavailable.
+- Content is clamped to the Discord embed limits (title 256, description 4096, field value
+  1024, 25 fields) both in the formatters and as a final safety net in the Discord render;
+  the Telegram render caps the whole message at 4096 chars with tag-safe truncation. Commit
+  subjects render only the first line, truncated to 200 chars.
 - Locale templates use a `{emoji}` placeholder immediately followed by the text (no space);
   the formatter injects `em(...)` which carries the trailing space.