release: bump 0.9.5 -> 0.9.6 (#331)

Documentation release for the R binding. The library API and every indicator are
unchanged from `0.9.5`; only the R package's help pages change.

### What's in 0.9.6
- **R package documentation** (landed in #330): the twelve undocumented data-layer
  exports now have full man pages, the stale `AwesomeOscillatorHistogram` codoc is
  fixed, and a broken `push()` example is corrected — clearing the two `R CMD check`
  warnings r-universe reported for `0.9.5`. CI now runs `R CMD check` so doc drift
  fails the PR instead of reaching r-universe.

Pure version-string bump on top — `bump_version.py` touched 19 files. `cargo fmt`
clean.

Tag/publish waits for explicit GO (irreversible publish to crates.io / PyPI / npm
/ NuGet / Maven / Go / r-universe).

Cargo.toml

@@ -14,7 +14,7 @@ members = [
 exclude = ["fuzz"]
 
 [workspace.package]
-version = "0.9.5"
+version = "0.9.6"
 authors = ["kingchenc <support@wickra.org>"]
 edition = "2021"
 rust-version = "1.86"
@@ -26,8 +26,8 @@ keywords = ["finance", "trading", "indicators", "technical-analysis", "ta"]
 categories = ["finance", "mathematics", "science"]
 
 [workspace.dependencies]
-wickra-core = { path = "crates/wickra-core", version = "0.9.5" }
-wickra-data = { path = "crates/wickra-data", version = "0.9.5" }
+wickra-core = { path = "crates/wickra-core", version = "0.9.6" }
+wickra-data = { path = "crates/wickra-data", version = "0.9.6" }
 
 thiserror = "2"
 rayon = "1.10"