test(session-search): regression coverage for CJK LIKE fallback

Twelve tests under TestCJKSearchFallback guarding:
 - CJK detection across Chinese/Japanese/Korean/Hiragana/Katakana ranges
   (including the full Hangul syllables block \uac00-\ud7af, to catch
   the shorter-range typo from one of the duplicate PRs)
 - Substring match for multi-char Chinese, Japanese, Korean queries
 - Filter preservation (source_filter, exclude_sources, role_filter)
   in the LIKE path — guards against the SQL-builder bug from another
   duplicate PR where filter clauses landed after LIMIT/OFFSET
 - Snippet centered on the matched term (instr-based substr window),
   not the leading 200 chars of content
 - English fast-path untouched
 - Empty/no-match cases
 - Mixed CJK+English queries

Also:
 - hermes_state.py: LIKE-fallback snippet is now
   `substr(content, max(1, instr(content, ?) - 40), 120)`, centered on
   the match instead of the whole-content default. Credit goes to
   @iamagenius00 for the snippet idea in PR #11517.
 - scripts/release.py: add @iamagenius00 to AUTHOR_MAP so future
   release attribution resolves cleanly.

Refs #11511, #11516, #11517, #11541.

Co-authored-by: iamagenius00 <iamagenius00@users.noreply.github.com>

scripts/release.py

@@ -207,6 +207,7 @@ AUTHOR_MAP = {
     "cola-runner@users.noreply.github.com": "cola-runner",
     "ygd58@users.noreply.github.com": "ygd58",
     "vominh1919@users.noreply.github.com": "vominh1919",
+    "iamagenius00@users.noreply.github.com": "iamagenius00",
     "trevmanthony@gmail.com": "trevthefoolish",
     "ziliangpeng@users.noreply.github.com": "ziliangpeng",
     "centripetal-star@users.noreply.github.com": "centripetal-star",