chore: bump hosts to 0.4.0

The host crates ship breaking changes (log format v2, flush and
set_wall_clock, the tines::serve signature, tines-core 1) that can't go
out as the already-released 0.3.0 (1.0 review S13). tines-core stays
1.0.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Cargo.toml

@@ -3,7 +3,7 @@ members = ["tines-core", "tines-sim", "tines-store", "tines-bt", "tines-ros2", "
 resolver = "2"
 
 [workspace.package]
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 license = "Apache-2.0"
 authors = ["K. Isom"]