docs(changelog): add memory fallback search credit

CHANGELOG.md

@@ -37,6 +37,7 @@ Docs: https://docs.openclaw.ai
 - Cron/isolated sessions: persist the right transcript path for each isolated run, including fresh session rollovers, so cron runs stop appending to stale session files. Thanks @samrusani and @vincentkoc.
 - CLI/memory-wiki: pass the active app config into the metadata registrar so built `openclaw wiki` commands resolve the live wiki plugin config instead of silently falling back to defaults. (#65012) Thanks @leonardsellem and @vincentkoc.
 - Dreaming/cron: wake managed dreaming jobs immediately instead of waiting for the next heartbeat, so scheduled dreaming runs start when the cron fires. (#65053) Thanks @l0cka and @vincentkoc.
+- Memory/search: improve FTS-only fallback lexical ranking when embeddings are unavailable, so degraded memory search surfaces stronger lexical matches more reliably. (#65395) Thanks @AnonAmit and @vincentkoc.
 - QA/packaging: stop packaged QA helpers from crashing when optional scenario execution config is unavailable, so npm distributions can skip the repo-only scenario pack without breaking completion-cache and startup paths. (#65118) Thanks @EdderTalmor and @vincentkoc.
 - Media/audio transcription: surface the real provider failure when every audio transcription attempt fails, so status output and the CLI stop collapsing those errors into generic skips. (#65096) Thanks @l0cka and @vincentkoc.
 - Memory/wiki: preserve Unicode letters, digits, and combining marks in wiki slugs and contradiction clustering, and cap Unicode filename segments to safe byte lengths so non-ASCII titles stop collapsing or overflowing path limits. (#64742) Thanks @zhouhe-xydt and @vincentkoc.