fix: tighten up some logic around session timestamps and ids (#922)

* update `SessionConfigured` event to include the UUID for the session
* show the UUID in the Rust TUI
* use local timestamps in log files instead of UTC
* include timestamps in log file names for easier discovery

codex-rs/core/Cargo.toml

@@ -31,7 +31,7 @@ reqwest = { version = "0.12", features = ["json", "stream"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 thiserror = "2.0.12"
-time = { version = "0.3", features = ["formatting", "macros"] }
+time = { version = "0.3", features = ["formatting", "local-offset", "macros"] }
 tokio = { version = "1", features = [
     "io-std",
     "macros",
@@ -44,7 +44,7 @@ toml = "0.8.20"
 tracing = { version = "0.1.41", features = ["log"] }
 tree-sitter = "0.25.3"
 tree-sitter-bash = "0.23.3"
-uuid = { version = "1", features = ["v4"] }
+uuid = { version = "1", features = ["serde", "v4"] }
 
 [target.'cfg(target_os = "linux")'.dependencies]
 libc = "0.2.172"