Remove the deprecated narratio resume command

docs/operations.md

@@ -63,7 +63,7 @@ narratio session init 2026-04-04 --remote --force
 
 If `campaign.yml` sets `session_template_file`, `session init` renders it. Template variables must resolve to concrete values.
 
-## Stage Execution and Resume Behavior
+## Stage Execution and Continuation Behavior
 
 Canonical stage order:
 
@@ -80,7 +80,7 @@ Canonical stage order:
 Execution rules:
 
 - succeeded stages are skipped unless `--force` is set;
-- `resume` starts at first non-succeeded stage;
+- `run` continues interrupted or partially completed sessions by running non-succeeded stages;
 - force rerunning a succeeded upstream stage marks succeeded downstream stages as `stale`.
 
 Single-stage execution:
@@ -91,7 +91,7 @@ narratio run-stage normalize 2026-04-04 --force
 
 ## Artifact Selection
 
-`--artifacts` can be used on `run`, `resume`, `run-stage`, `analyze`, and `publish`.
+`--artifacts` can be used on `run`, `run-stage`, `analyze`, and `publish`.
 
 Selection behavior: