release: bump 0.8.2 -> 0.8.3 (#249)

Version bump 0.8.2 → 0.8.3, releasing the per-binding throughput benchmark work
(merged in #246).

Bumped via `ScriptHelpers/bump_version.py` across all manual touchpoints —
`Cargo.toml`, `pyproject.toml`, the Node `package.json` + 6 platform packages +
both lockfiles, the Java `pom.xml`s + README, the C# `.csproj`, the R
`DESCRIPTION` — plus `Cargo.lock` (via `cargo build`) and the `CHANGELOG.md`
`[0.8.3]` section and compare URLs.

CHANGELOG `[0.8.3]`:
- Per-binding throughput benchmarks for all 9 targets (BENCHMARKS.md §3).
- C ABI archetype test (`examples/c/archetypes.c`).

`cargo fmt`, `cargo test --workspace --all-features` (all green) and
`cargo clippy --workspace --all-targets --all-features -D warnings` pass. The
docs/webpage version strings are bumped by `sync-about.yml` on the `v*` tag —
not touched here.

examples/node/package-lock.json

@@ -17,7 +17,7 @@
     },
     "../../bindings/node": {
       "name": "wickra",
-      "version": "0.8.2",
+      "version": "0.8.3",
       "license": "MIT OR Apache-2.0",
       "devDependencies": {
         "@napi-rs/cli": "^2.18.0"
@@ -26,12 +26,12 @@
         "node": ">= 18"
       },
       "optionalDependencies": {
-        "wickra-darwin-arm64": "0.8.2",
-        "wickra-darwin-x64": "0.8.2",
-        "wickra-linux-arm64-gnu": "0.8.2",
-        "wickra-linux-x64-gnu": "0.8.2",
-        "wickra-win32-arm64-msvc": "0.8.2",
-        "wickra-win32-x64-msvc": "0.8.2"
+        "wickra-darwin-arm64": "0.8.3",
+        "wickra-darwin-x64": "0.8.3",
+        "wickra-linux-arm64-gnu": "0.8.3",
+        "wickra-linux-x64-gnu": "0.8.3",
+        "wickra-win32-arm64-msvc": "0.8.3",
+        "wickra-win32-x64-msvc": "0.8.3"
       }
     },
     "node_modules/wickra": {