chore: prepare release v0.19.0

Bump the workspace version from 0.18.0 to 0.19.0 (and the internal
hyperlight-* dependency versions with it), roll the CHANGELOG's
[Prerelease] section into [v0.19.0] with a fresh empty [Prerelease] and
the compare-link footer, and sync the root and rust_guests Cargo.lock
files to match.  Follows docs/how-to-make-releases.md; the tag is cut
after this merges.

Signed-off-by: danbugs <danilochiarlone@gmail.com>

Author: danbugs

CHANGELOG.md

@@ -4,6 +4,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Prerelease] - Unreleased
 
+## [v0.19.0] - 2026-11-04
+
 ### Added
 * `Sandbox::snapshot_with_options` takes a snapshot with `SnapshotOptions`. `SnapshotOptions::scratch_size` gives the sandbox, and later restores of the snapshot, a different scratch size. A guest can boot with the scratch its initialisation needs and run guest function calls from a snapshot with only the scratch they need, so each restore costs less. It can also give a guest more scratch than it booted with.
 * `Sandbox::scratch_allocated_bytes` returns how much scratch the guest has allocated since the sandbox was last restored or snapshotted. The guest controls the value it is read from.
@@ -459,7 +461,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 The Initial Hyperlight Release 🎉 
 
 
-[Prerelease]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.18.0...HEAD>
+[Prerelease]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.19.0...HEAD>
+[v0.19.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.18.0...v0.19.0>
 [v0.18.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.17.0...v0.18.0>
 [v0.17.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.16.0...v0.17.0>
 [v0.16.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.15.0...v0.16.0>

Cargo.lock

@@ -30,7 +30,7 @@ exclude = [
 ]
 
 [workspace.package]
-version = "0.18.0"
+version = "0.19.0"
 edition = "2024"
 rust-version = "1.89"
 license = "Apache-2.0"
@@ -39,17 +39,17 @@ repository = "https://github.com/hyperlight-dev/hyperlight"
 readme = "README.md"
 
 [workspace.dependencies]
-hyperlight-common = { path = "src/hyperlight_common", version = "0.18.0", default-features = false }
-hyperlight-host = { path = "src/hyperlight_host", version = "0.18.0", default-features = false }
-hyperlight-guest = { path = "src/hyperlight_guest", version = "0.18.0", default-features = false }
-hyperlight-guest-bin = { path = "src/hyperlight_guest_bin", version = "0.18.0", default-features = false }
-hyperlight-guest-macro = { path = "src/hyperlight_guest_macro", version = "0.18.0", default-features = false }
+hyperlight-common = { path = "src/hyperlight_common", version = "0.19.0", default-features = false }
+hyperlight-host = { path = "src/hyperlight_host", version = "0.19.0", default-features = false }
+hyperlight-guest = { path = "src/hyperlight_guest", version = "0.19.0", default-features = false }
+hyperlight-guest-bin = { path = "src/hyperlight_guest_bin", version = "0.19.0", default-features = false }
+hyperlight-guest-macro = { path = "src/hyperlight_guest_macro", version = "0.19.0", default-features = false }
 hyperlight-testing = { path = "src/hyperlight_testing", default-features = false }
-hyperlight-guest-tracing = { path = "src/hyperlight_guest_tracing", version = "0.18.0", default-features = false }
-hyperlight-libc = { path = "src/hyperlight_libc", version = "0.18.0", default-features = false }
-hyperlight-component-util = { path = "src/hyperlight_component_util", version = "0.18.0", default-features = false }
-hyperlight-component-macro = { path = "src/hyperlight_component_macro", version = "0.18.0", default-features = false }
-hyperlight-component-csharp = { path = "src/hyperlight_component_csharp", version = "0.18.0", default-features = false }
+hyperlight-guest-tracing = { path = "src/hyperlight_guest_tracing", version = "0.19.0", default-features = false }
+hyperlight-libc = { path = "src/hyperlight_libc", version = "0.19.0", default-features = false }
+hyperlight-component-util = { path = "src/hyperlight_component_util", version = "0.19.0", default-features = false }
+hyperlight-component-macro = { path = "src/hyperlight_component_macro", version = "0.19.0", default-features = false }
+hyperlight-component-csharp = { path = "src/hyperlight_component_csharp", version = "0.19.0", default-features = false }
 
 [workspace.lints.rust]
 unsafe_op_in_unsafe_fn = "deny"