De-slop: remove every em-dash + banned words across all modules + capstone (#94)

Co-authored-by: claude <[email protected]>
Co-committed-by: claude <[email protected]>

modules/16-containers-and-reproducible-environments/lab/dockerignore-starter

@@ -4,19 +4,19 @@
 # bloat the image, slow the build, or leak into it. A lean, predictable build context is part of
 # what makes the image reproducible.
 
-# Python caches — regenerated, never shipped
+# Python caches: regenerated, never shipped
 __pycache__/
 *.pyc
 
-# Runtime state — never bake one machine's data into a shared image
+# Runtime state: never bake one machine's data into a shared image
 tasks.json
 
-# Version control and project meta — not needed to run the app
+# Version control and project meta: not needed to run the app
 .git/
 .gitignore
 .dockerignore
 
-# Local environments and docs — keep them out of the image
+# Local environments and docs: keep them out of the image
 .venv/
 venv/
 *.md