docs: update daemon CLI syntax from flags to subcommands

Update all documentation to use the new subcommand syntax:
- `bd daemon --start` → `bd daemon start`
- `bd daemon --stop` → `bd daemon stop`
- `bd daemon --status` → `bd daemon status`
- `bd daemon --health` → `bd daemon status --all`
- `--global=false` → `--local`

The old flag syntax is deprecated but still works with warnings.

Closes: bd-734vd

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

docs/EXCLUSIVE_LOCK.md

@@ -180,7 +180,7 @@ Check daemon logs (default: `.beads/daemon.log`) to troubleshoot lock issues.
 
 ## Testing Your Integration
 
-1. **Start the daemon**: `bd daemon --interval 1m`
+1. **Start the daemon**: `bd daemon start --interval 1m`
 2. **Create a lock**: Use your tool to create `.beads/.exclusive-lock`
 3. **Verify daemon skips**: Check daemon logs for "Skipping database" message
 4. **Release lock**: Remove `.beads/.exclusive-lock`