fix: remove title truncation from alert backend builders

Mastodon, Bluesky, GitHub, GitLab, npm, PyPI, and arXiv backends
no longer truncate content/descriptions in titles. Full text is
shown on the PRIVMSG line; only !alert history keeps truncation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/alert.py

@@ -604,7 +604,7 @@ def _search_mastodon(keyword: str) -> list[dict]:
                 continue
             acct = (status.get("account") or {}).get("acct", "")
             content = _strip_html(status.get("content", ""))
-            title = f"@{acct}: {_truncate(content, 60)}" if acct else content
+            title = f"@{acct}: {content}" if acct else content
             items.append({
                 "id": status_url,
                 "title": title,
@@ -903,7 +903,7 @@ def _search_bluesky(keyword: str) -> list[dict]:
         display = author.get("displayName") or handle
         record = post.get("record") or {}
         text = record.get("text", "")
-        title = f"@{display}: {_truncate(text, 60)}"
+        title = f"@{display}: {text}"
         date = _parse_date(record.get("createdAt", ""))
         post_url = f"https://bsky.app/profile/{handle}/post/{rkey}" if handle else ""
         results.append({
@@ -1143,7 +1143,7 @@ def _search_github(keyword: str) -> list[dict]:
         stars = repo.get("stargazers_count", 0)
         title = full_name
         if description:
-            title += f": {_truncate(description, 50)}"
+            title += f": {description}"
         if stars:
             title += f" [{stars}*]"
         date = _parse_date(repo.get("updated_at", ""))
@@ -1280,7 +1280,7 @@ def _search_gitlab(keyword: str) -> list[dict]:
         stars = repo.get("star_count", 0)
         title = name
         if description:
-            title += f": {_truncate(description, 50)}"
+            title += f": {description}"
         if stars:
             title += f" [{stars}*]"
         date = _parse_date(repo.get("last_activity_at", ""))
@@ -1320,7 +1320,7 @@ def _search_npm(keyword: str) -> list[dict]:
         npm_url = links.get("npm", f"https://www.npmjs.com/package/{name}")
         title = f"{name}@{version}" if version else name
         if description:
-            title += f": {_truncate(description, 50)}"
+            title += f": {description}"
         date = _parse_date(pkg.get("date", ""))
         results.append({
             "id": name, "title": title, "url": npm_url,
@@ -1356,7 +1356,7 @@ def _search_pypi(keyword: str) -> list[dict]:
         pkg_name = title.split()[0] if title else ""
         display = title
         if desc:
-            display += f": {_truncate(desc, 50)}"
+            display += f": {desc}"
         results.append({
             "id": pkg_name or link,
             "title": display,
@@ -1393,7 +1393,7 @@ def _search_dockerhub(keyword: str) -> list[dict]:
         stars = item.get("star_count", 0)
         title = name
         if description:
-            title += f": {_truncate(description, 50)}"
+            title += f": {description}"
         if stars:
             title += f" [{stars}*]"
         hub_url = (