docs(blog): re-measure the Todo and showcase sizes in the context-window post and rewrite the sentence they no longer support

The post's Todo and showcase figures (~14.5k, 83 files / ~101k) were derived
as bytes of non-test .ts files under examples/<app>/src divided by 4. At this
base the same method gives app-todo 27 files / 97,653 bytes (~24.4k) and
app-showcase 91 files / 696,149 bytes (~174k), which is about 87% of the 200k
window the post already uses for the CRM paragraph. "leaves half a modern
context window free" is false at those numbers; the maximalist example still
fits, with about 13% to spare.

Claude-Session: https://claude.ai/code/session_0115N1oNnQS5WqofZ2DzaT3q
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

content/blog/context-window-is-the-constraint.mdx

@@ -46,10 +46,10 @@ That's the **whole example app**. Not a module of it — the data model, the
 UI, the automation, the access rules, all of it. It fits in about 9% of a
 200k-token context window.
 
-The Todo example is ~14.5k tokens. The kitchen-sink showcase app — which
-deliberately exercises every metadata type in the protocol, 83 files of it — is
-~101k. Even that one, the maximalist case, leaves half a modern context window
-free for the actual work.
+The Todo example is ~24.5k tokens. The kitchen-sink showcase app — which
+deliberately exercises every metadata type in the protocol, 91 files of it — is
+~174k. Even that one, the maximalist case, still fits in a 200k-token window —
+about 87% of it, leaving about 13% free for the actual work.
 
 Measure your own: