Expand sample downloads and update diagram links

Added links to additional e-commerce and feed sample CSV files in the downloads documentation. Also updated diagram links to point to .md files and added a quick navigation section for sample exploration.

Author: roshit-omanakuttan

docs/downloads.md

@@ -5,6 +5,8 @@ title: Raw Assets & Downloads
 # Raw Assets & Downloads
 
 Use these for local testing/importing into tools.  
+**Explore samples:** [E-commerce Samples](ecom/samples.md) · [Feed Samples](feed/samples.md)
+
 If a folder is missing in your repo, create it and copy files from your working branch.
 
 ## Samples
@@ -15,22 +17,37 @@ If a folder is missing in your repo, create it and copy files from your working
 | `access_patterns.csv` | Canonical access patterns for the e-commerce example. | [Download](assets/samples/ecom/access_patterns.csv) |
 | `queries.http` | Copy-pasteable HTTP requests (GET/Query/Batch, etc.). | [Download](assets/samples/ecom/queries.http) |
 | `seed.jsonl` | Seed data (JSON Lines) for quick prototyping. | [Download](assets/samples/ecom/seed.jsonl) |
+| `users.csv` | User master rows. | [Download](assets/samples/ecom/users.csv) |
+| `orders.csv` | Order meta rows (PK=ORDER#id, SK=META). | [Download](assets/samples/ecom/orders.csv) |
+| `order_lines.csv` | Lines (PK=ORDER#id, SK=LINE#no). | [Download](assets/samples/ecom/order_lines.csv) |
+| `payments.csv` | Payment attempts. | [Download](assets/samples/ecom/payments.csv) |
+| `shipments.csv` | Shipment updates. | [Download](assets/samples/ecom/shipments.csv) |
+| `products.csv` | Product catalog (sample). | [Download](assets/samples/ecom/products.csv) |
+| `inventory_snapshots.csv` | Inventory snapshots. | [Download](assets/samples/ecom/inventory_snapshots.csv) |
+| `addresses.csv` | Address book (per user). | [Download](assets/samples/ecom/addresses.csv) |
+| `events_outbox.csv` | Outbox events for async publish. | [Download](assets/samples/ecom/events_outbox.csv) |
 
 ### Social / Activity Feed
 | File | Description | Download |
 |---|---|---|
 | `access_patterns.csv` | Access patterns for timelines, fan-out, etc. | [Download](assets/samples/feed/access_patterns.csv) |
 | `queries.http` | HTTP queries for feed write/read paths. | [Download](assets/samples/feed/queries.http) |
 | `seed.jsonl` | Seed data for users, posts, timelines. | [Download](assets/samples/feed/seed.jsonl) |
+| `users.csv` | User master rows. | [Download](assets/samples/feed/users.csv) |
+| `posts.csv` | Posts (PK=POST#id, SK=META). | [Download](assets/samples/feed/posts.csv) |
+| `likes.csv` | Likes per post. | [Download](assets/samples/feed/likes.csv) |
+| `comments.csv` | Comments per post. | [Download](assets/samples/feed/comments.csv) |
+| `hashtags.csv` | Post tags. | [Download](assets/samples/feed/hashtags.csv) |
+| `feed_fanout.csv` | Fanout entries (home feed). | [Download](assets/samples/feed/feed_fanout.csv) |
+| `follows.csv` | Follow graph edges. | [Download](assets/samples/feed/follows.csv) |
+| `notifications.csv` | Notifications sample. | [Download](assets/samples/feed/notifications.csv) |
 
 ## Diagrams
 
-
 | Topic | Go |
 |---|---|
-| E-commerce | [Open Diagrams](ecom/diagrams/) |
-| Social / Activity Feed | [Open Diagrams](feed/diagrams/) |
-
+| E-commerce | [Open Diagrams](ecom/diagrams.md) |
+| Social / Activity Feed | [Open Diagrams](feed/diagrams.md) |
 
 ## Production Checklists