feat(rtk): add JS-native git-log filter (#2423)

Compress git log output via dedicated RTK filter: keep commit headers,
Author/Date, subject; drop body padding, decoration, embedded diff lines.
Wire into autodetect (git-log prioritized before git-diff) and registry.

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/rtk/registry.js

@@ -1,6 +1,7 @@
 import { FILTERS } from "./constants.js";
 import { gitDiff } from "./filters/gitDiff.js";
 import { gitStatus } from "./filters/gitStatus.js";
+import { gitLog } from "./filters/gitLog.js";
 import { grep } from "./filters/grep.js";
 import { find } from "./filters/find.js";
 import { dedupLog } from "./filters/dedupLog.js";
@@ -13,6 +14,7 @@ import { searchList } from "./filters/searchList.js";
 const REGISTRY = {
   [FILTERS.GIT_DIFF]: gitDiff,
   [FILTERS.GIT_STATUS]: gitStatus,
+  [FILTERS.GIT_LOG]: gitLog,
   [FILTERS.GREP]: grep,
   [FILTERS.FIND]: find,
   [FILTERS.DEDUP_LOG]: dedupLog,