docs(atvm): add atvm_prep shorthand and client/esx mapping defaults

atvm/docs/automation/atvm-prep-reference.md

@@ -40,6 +40,22 @@ Notable arguments:
 - `-vp` / `--vcenter_password`
 - `-e` / `--esx_host_ip`: defaults to `192.168.1.165`
 
+## Workspace Shorthand Mapping
+For requests in this workspace, operator shorthand may be expanded as follows:
+
+1. Datastore/LUN shorthand for `-n`
+- `Gold` -> `AutomatedTest-VMBootImg-Gold`
+- `Gold2` -> `AutomatedTest-VMBootImg-Gold-2`
+- `ComputeMigration` (or `compute migration`) -> `AutomatedTest-VMBootImgComputeMigration-Gold`
+
+2. Client/ESXi pairing (`-c` with `-e`)
+- `CDS1-ESX165` <-> `192.168.1.165`
+- `CDS1-ESX166` <-> `192.168.1.166`
+
+3. Inference rules
+- If only one side of the pair is supplied (`-c` or `-e`), auto-fill the other side from this mapping.
+- If both are supplied but conflict, stop and confirm before execution.
+
 ## Operational Flow
 High-level behavior across modes: