docs: limit release note to current version

Author: johnhuang316

RELEASE_NOTE.txt

@@ -9,40 +9,3 @@
 ### Upgrade Notes
 - No new dependencies; update via standard `uv sync` after pulling.
 - Run `uv run pytest` to confirm the new search filter tests on your environment.
-
-## Shallow Index Default & Streamlined Server
-
-This release focuses on faster first-run experiences and a slimmer MCP surface area.
-
-### Highlights
-
-- **Shallow index by default**: Projects initialize with the new JSON-based shallow index for rapid file discovery.
-- **Deep index on demand**: Added the `build_deep_index` tool so symbol extraction happens only when you request it.
-- **Watcher-friendly rebuilds**: File watcher callbacks now refresh the shallow index, keeping file lists current without long rebuilds.
-- **Server cleanup**: Removed unused `structure://project` resource, legacy prompts, and auxiliary documents for a leaner runtime.
-
-### Developer Experience Improvements
-
-- `find_files` now enforces true glob semantics (single `*` for one segment, `**` for recursive matches).
-- `get_file_summary` responds with a `needs_deep_index` hint when deep symbols are unavailable.
-- Index management services split shallow vs deep rebuild paths to clarify tool behavior.
-- Repository docs (README, localized copies) highlight when to run `build_deep_index`.
-
-### Cleanups
-
-- Removed deprecated architecture and benchmarking documents.
-- Trimmed benchmark scripts and outdated tests tied to the old SCIP experiment.
-
-### Upgrade Notes
-
-1. After updating, call `set_project_path` as usual - the server will build the shallow index automatically.
-2. Run `build_deep_index` whenever you need symbol-level summaries (`get_file_summary`) or deep search capabilities.
-3. Optionally run `refresh_index` to refresh the shallow index if the watcher is disabled.
-
-### Compatibility
-
-- Tool names and signatures are unchanged.
-- Deep-index workflows remain available; they now require an explicit `build_deep_index` call.
-- Python 3.10+ requirement unchanged; no new third-party dependencies.
-
-Enjoy faster cold starts and a simpler interface tailored for LLM-driven workflows.