Merge remote-tracking branch 'origin/main' into pr-62-density-local

# Conflicts:
#	datasketches/src/common/mod.rs
#	datasketches/src/lib.rs

Author: PsiACE

.asf.yaml

@@ -41,7 +41,8 @@ github:
       required_status_checks:
         contexts:
           - Required
-      required_pull_request_reviews: {}
+      required_pull_request_reviews:
+        required_approving_review_count: 1
 
   dependabot_alerts:  true
   dependabot_updates: false

.github/workflows/ci.yml

@@ -18,9 +18,9 @@
 name: CI
 on:
   pull_request:
-    branches: [ main ]
+    branches: [main]
   push:
-    branches: [ main ]
+    branches: [main]
 
 # Concurrency strategy:
 #   github.workflow: distinguish this workflow from others
@@ -52,8 +52,12 @@ jobs:
       - uses: taiki-e/install-action@v2
         with:
           tool: typos-cli,taplo-cli,hawkeye
-      - name: Check all
+      - name: Check lockfile
+        run: cargo update -w --locked --verbose
+      - name: Check linters
         run: cargo x lint
+      - name: Check feature matrix
+        run: cargo x check
 
   msrv:
     name: Resolve MSRV
@@ -73,23 +77,25 @@ jobs:
     needs: msrv
     strategy:
       matrix:
-        os: [ ubuntu-24.04, macos-14, windows-2022 ]
+        os: [ubuntu-24.04, macos-14, windows-2022]
         rust-version: ${{ fromJson(needs.msrv.outputs.rust-versions) }}
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v6
       - name: Delete rust-toolchain.toml
         run: rm rust-toolchain.toml
-      - uses: Swatinem/rust-cache@v2
       - name: Install toolchain
         run: |
           rustup toolchain install ${{ matrix.rust-version }}
           rustup default ${{ matrix.rust-version }}
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-bin: "false"
       - name: Setup Java
         uses: actions/setup-java@v5
         with:
-          java-version: '25'
-          distribution: 'temurin'
+          java-version: "25"
+          distribution: "temurin"
       - name: Prepare test data
         shell: bash
         run: ./tools/generate_serialization_test_data.py

CHANGELOG.md

@@ -4,18 +4,28 @@ All significant changes to this project will be documented in this file.
 
 ## Unreleased
 
+## v0.3.0 (2026-05-18)
+
 ### Breaking changes
 
 * `CountMinSketch` now has a type parameter for the count type. Possible values are `u8` to `u64` and `i8` to `i64`.
 * `HllUnion::get_result` is renamed to `HllUnion::to_sketch`.
+* `update_f32` and `update_f64` are removed from `ThetaSketch`. Use `hash_value`'s wrapper instead.
+* All sketches are now gated by a feature flag. You need to enable the feature flag to use the sketch. For example, to use `CountMinSketch`, you need to enable the `countmin` feature.
+
+### Notable changes
+
+* The MSRV (Minimum Supported Rust Version) is now 1.86.0.
 
 ### New features
 
+* New module `hash_value` provides several value wrappers for matching concrete hashing strategies.
 * `CountMinSketch` with unsigned values now supports `halve` and `decay` operations.
 * `CpcSketch` and `CpcUnion` are now available for cardinality estimation.
 * `CpcWrapper` is now available for reading estimation from a serialized CpcSketch without full deserialization.
 * `FrequentItemsSketch` now supports serde for any value implement `FrequentItemValue` (builtin supports for `i64`, `u64`, and `String`).
 * Expose `codec::SketchBytes`, `codec::SketchSlice`, and `FrequentItemValue` as public API.
+* `hll::Coupon` is now public. You can calculate the coupon and reuse it multiple times avoiding the overhead of hashing multiple times.
 
 ## v0.2.0 (2026-01-14)
 

CONTRIBUTING.md

@@ -27,7 +27,7 @@ Rustup will read the `rust-toolchain.toml` file and set up everything else autom
 
 ```shell
 cargo version
-# cargo 1.85.0 (<hash> 2024-12-31)
+# cargo 1.86.0 (<hash> <date>)
 ```
 
 To keep code style consistent, run `cargo x lint --fix` to automatically fix any style issues before committing your changes.