Omni/Deploy: add WorkingDirectory support and rename to deployer

- Add execWorkingDirectory field to Exec type in Manifest.hs
- Generate WorkingDirectory= in systemd unit files
- Allow add-service to update existing services
- Rename biz-deployer to deployer throughout
- Fix Caddy.hs and Systemd.hs tests for new Exec constructor

This fixes subagent stalls caused by Coder running direnv from wrong directory.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/Omni/Deploy/Deployer.nix b/Omni/Deploy/Deployer.nix
index 54a8f6c..ed4241e 100644
--- a/Omni/Deploy/Deployer.nix
+++ b/Omni/Deploy/Deployer.nix
@@ -12,7 +12,7 @@ in {
 
     package = lib.mkOption {
       type = lib.types.package;
-      description = "The biz-deployer package to use";
+      description = "The deployer package to use";
     };
 
     manifestPackage = lib.mkOption {
@@ -28,7 +28,7 @@ in {
 
     stateDir = lib.mkOption {
       type = lib.types.path;
-      default = "/var/lib/biz-deployer";
+      default = "/var/lib/deployer";
       description = "Directory for deployer state and generated unit files";
     };
 
@@ -69,7 +69,7 @@ in {
 
       serviceConfig = {
         Type = "oneshot";
-        ExecStart = "${cfg.package}/bin/biz-deployer once";
+        ExecStart = "${cfg.package}/bin/deployer once";
         Environment = [
           "HOME=/root"
           "AWS_SHARED_CREDENTIALS_FILE=/root/.aws/credentials"