Release Loro v1.9.0

Highlights

JSONPath queries are now RFC 9535 compliant across both Rust and WASM bindings. A new parser, evaluator, and conformance test suite (PR #848, commit 21d13218) unlock richer filters like in and contains while delivering clearer error messages. Thanks @zolero!
Source maps become first-class in the WASM toolchain. loro-wasm-tools now embeds symbols during bundling (#836) and the new loro-wasm-map package publishes maps next to the runtime bundle (#844), drastically simplifying debugging in browsers, Vite, and other build systems.

Removed legacy v0.x encoding path (#849, 10a405b4). Legacy serializers, compatibility fuzz tests, and decoding shims are gone. All runtimes now rely on the v1.* encoding format. Documents created with v0.x must be migrated via an intermediate ≤1.8.x release before installing 1.9.0.

Spec-compliant JSONPath (#848, 21d13218). Ships a Pest-based parser, richer AST, the in/contains filter operators, better existence checks, and shared tests/benchmarks to keep Rust and WASM perfectly aligned.
WASM debugging experience (#836, 6f987022; #844, 53f55331). Adds loro-wasm-tools for embedding sourcemaps, automates sourcemap publishing in CI, and hosts the maps in a dedicated workspace package so source-level debugging works without manual steps.
Better bundler support (#852 3af6a857, #851 366f0161). Patches the JS entry points so esbuild and rsbuild can import the WASM bundle with zero loader overrides.
Bun runtime improvements (#829 b8c070fd, #828 cf123453, #827 8b622619, #834 865bccba). Streams the WASM binary during bundling, pre-seeds the externref table, integrates Bun into CI, and removes earlier hacks that hid loader bugs.
JavaScript performance (#820 c2c535c1). Event conversion now runs exactly once per callback invocation, trimming overhead during heavy real-time editing sessions.
Core dependency refresh (e8f79de8, b2f5e107). Upgrades generic-btree and the columnar storage crate to pick up the latest bug fixes and perf wins.

Fixed tree undo operations that moved nodes between siblings (#821 76a8728e).
Resolved container ID bookkeeping when exporting shallow snapshots (#823 b72a759a) and ensured pending containers now return None instead of leaking state (#840 35d9064d).
Prevented LoroMap entries from turning into null after applyDiff (#825 3afc4d52).
Ensured undo manager callbacks fire without tripping Rust aliasing violations (#831 a39daf85).
Guarded against panics when cursors point to deleted entries (#835 e97e6056) and when fetching unknown cursors in JS integration tests.
Cleaned up WASM loader glue so we no longer rely on an extra patch (#834 865bccba) and added multiple Bun regression tests (#828 cf123453).
Tightened CI release scripts (74b78514, 2383cdc1, 4740a04c, 3373e046, 24f93249) to keep loro-wasm artifacts and sourcemaps publishing in sync.