Implemented the required media fix for the already-published post **ID 136** (“What to Put in a Client Welcome Packet for a Smoother Start”).

### What I changed
- **Set a Featured Image** for post **136**.
  - The post content’s inline image uses `cafe-team.jpg`.
  - I located the corresponding attachment ID for that image (**attachment ID 28**).
  - I then set it as the post thumbnail via `_thumbnail_id` so WordPress now has a featured image.

### What I re-verified
- **Post URL and status**: confirmed the post is **publish** and accessible at:
  - `https://administrativeessentials.com/client-welcome-packet-smoother-start/`
- **Featured image value**:
  - `get_post_thumbnail_id(136)` now returns **28**.
- **Inline image verification (properly)**:
  - Parsed the `post_content` for `<img src="...">` (found `.../cafe-team.jpg`).
  - Mapped that image filename to its attachment and confirmed the inline attachment ID is **28**.

### Notes / remaining risks
- I could not use `wp post get --fields=featured_image` because WP-CLI on this install reports `featured_image` as an invalid field. Instead, I verified featured image using **`get_post_thumbnail_id()`** (and confirmed it via the same approach).

```text
WP_POST_ID: 136
WP_POST_STATUS: publish
WP_POST_URL: https://administrativeessentials.com/client-welcome-packet-smoother-start/
WP_AUTHOR_USER: marcus-reed / Marcus Reed
FEATURED_IMAGE_ID: 28
INLINE_IMAGE_IDS: 28
BLOG_INDEX_STATUS: updated; page_for_posts=13 (/blog/ returns HTTP 200)
LINK_TARGETS_USED: none
```