Add profile inspection command

docs/cli.md

@@ -24,6 +24,7 @@ go run ./cmd/scriptorium render \
 - `scriptorium render`: prepare a prompt and write prepared-run output.
 - `scriptorium serve`: start the HTTP server.
 - `scriptorium inspect prompt`: inspect one prompt definition without model execution.
+- `scriptorium inspect profile`: inspect one effective profile without model execution.
 
 All commands accept `--config <path>` and reject positional arguments. An
 effective `prompt_dir` is required for every command. Supply it through the
@@ -151,6 +152,18 @@ and writes to stdout unless `--out` is supplied. It loads and normalizes the
 selected definition but does not resolve a profile, load a schema, render a
 template, reserve backend capacity, or call a model.
 
+## `scriptorium inspect profile`
+
+```text
+scriptorium inspect profile --profile ID
+    [--config PATH] [--profile-dir DIR] [--format text|json] [--out PATH]
+```
+
+`--profile` is required; built-in profiles need no prompt directory. Inspection
+resolves profile inheritance and backend defaults, but never reads a credential
+value, loads a prompt, reserves capacity, or calls a model. Unset provider
+controls are shown as zero values when Promptkit leaves them unspecified.
+
 ## Input And Variable Syntax
 
 `--input name=path` maps an input name to a local file; `--var name=value`