Accumulate config engine, build metadata, and doc updates

Remaining files from the backlog: Lua config engine
additions (general/register/support/window), workspace Cargo.toml/
Cargo.lock churn from the new dependencies added elsewhere in this
sweep, srdwm/main.rs wiring, and docs (DEFAULTS.md plus a new
SESSION_HANDOFF.md written mid-session for continuity across a restart
- see that file's own header for what it is and isn't).

1 files changed, 2 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 4c12acc..e3ac289 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,6 +31,8 @@ srdwm-macos = { path = "crates/macos" }
 
 log = "0.4"
 env_logger = "0.11"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 thiserror = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"