chore: prepare 0.8 code freeze (#833)

#### Overview

Prepare `main` for the NeMo Relay 0.8 code freeze and post-freeze 0.9.0 development.

- [x] I confirm this contribution is my own work, or I have the right to submit it under this project's license.
- [x] I searched existing issues and open pull requests, and this does not duplicate existing work.

#### Details

- Adds `release/0.8` to nightly alpha branch configuration.
- Runs `just set-version 0.9.0` across Cargo, Python, Node, OpenClaw, and coding-agent package surfaces.
- Regenerates the worker-plugin fixture lockfile.
- Updates current-version installation and package examples to 0.9.0.

#### Where should the reviewer start?

Start with `.github/nightly-alpha-branches.yaml` and `Cargo.toml`; the remaining changes synchronize versioned package metadata and current-version documentation.

#### Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

- Relates to: none


## Summary by CodeRabbit

- **Release**
  - Updated packages, plugins, integrations, and SDK components to version 0.9.0.
  - Updated installation guidance for the Rust CLI and other supported platforms.

- **Documentation**
  - Refreshed installation, quick-start, build, and integration instructions for version 0.9.0.
  - Updated Node.js, Python, Rust, OpenClaw, and related integration examples.

- **Chores**
  - Added the `release/0.8` branch to nightly alpha builds.
  - Expanded compatibility coverage for plugins using older Relay version requirements.

Authors:
  - Bryan Bednarski (https://github.com/bbednarski9)

Approvers:
  - Eric Evans II (https://github.com/ericevans-nv)
  - Will Killian (https://github.com/willkill07)

URL: #833

Author: bbednarski9

.github/nightly-alpha-branches.yaml

@@ -3,3 +3,4 @@
 
 branches:
   - main
+  - release/0.8

Cargo.lock

@@ -20,21 +20,21 @@ exclude = [".tmp", ".uv-cache"]
 resolver = "2"
 
 [workspace.package]
-version = "0.8.0"
+version = "0.9.0"
 edition = "2024"
 license = "Apache-2.0"
 repository = "https://github.com/NVIDIA/NeMo-Relay"
 
 [workspace.dependencies]
-nemo-relay = { version = "0.8.0", path = "crates/core", default-features = false }
-nemo-relay-types = { version = "0.8.0", path = "crates/types" }
-nemo-relay-plugin = { version = "0.8.0", path = "crates/plugin" }
-nemo-relay-worker-proto = { version = "0.8.0", path = "crates/worker-proto" }
-nemo-relay-worker = { version = "0.8.0", path = "crates/worker" }
-nemo-relay-adaptive = { version = "0.8.0", path = "crates/adaptive" }
-nemo-relay-pii-redaction = { version = "0.8.0", path = "crates/pii-redaction" }
-nemo-relay-ffi = { version = "0.8.0", path = "crates/ffi" }
-nemo-relay-cli = { version = "0.8.0", path = "crates/cli" }
+nemo-relay = { version = "0.9.0", path = "crates/core", default-features = false }
+nemo-relay-types = { version = "0.9.0", path = "crates/types" }
+nemo-relay-plugin = { version = "0.9.0", path = "crates/plugin" }
+nemo-relay-worker-proto = { version = "0.9.0", path = "crates/worker-proto" }
+nemo-relay-worker = { version = "0.9.0", path = "crates/worker" }
+nemo-relay-adaptive = { version = "0.9.0", path = "crates/adaptive" }
+nemo-relay-pii-redaction = { version = "0.9.0", path = "crates/pii-redaction" }
+nemo-relay-ffi = { version = "0.9.0", path = "crates/ffi" }
+nemo-relay-cli = { version = "0.9.0", path = "crates/cli" }
 opentelemetry = { version = "0.32", default-features = false }
 opentelemetry-semantic-conventions = { version = "0.32.1", default-features = false, features = ["semconv_experimental"] }
 opentelemetry_sdk = { version = "0.32.1", default-features = false }

Cargo.toml

@@ -223,7 +223,7 @@ uv add nemo-relay
 
 # Node.js
 # Requires Node.js 24 or newer.
-npm install nemo-relay-node@0.8.0
+npm install nemo-relay-node@0.9.0
 
 # Rust
 cargo add nemo-relay