docs: update markdown metadata and contributing guidelines

.cursor/rules/markdown-metadata.mdc

@@ -10,7 +10,7 @@ All Markdown files (`.md`) in this workspace should begin with a YAML frontmatte
 **Standard Fields:**
 
 *   `title`: (String) The main title of the page.
-*   `description`: (String) A brief summary of the page content under 250 characters.
+*   `description`: (String) A brief summary of the page content under 140 characters.
 *   `published`: (Boolean) `true` or `false` indicating if the page is live.
 *   `date`: (String) The last updated date in ISO 8601 format (e.g., `YYYY-MM-DDTHH:mm:ss.sssZ`).
 *   `tags`: (String) A comma-separated list of relevant keywords (kebab-case).

community/CONTRIBUTING.md

@@ -28,7 +28,7 @@ Keep files within one of these top‑level folders (no deep trees). Use cross‑
 
 ## Frontmatter requirements
 
-All Markdown files start with YAML frontmatter. Standard fields remain mandatory: title, description, published, date, tags, editor, dateCreated. Add these governance fields:
+All Markdown files start with YAML frontmatter. Standard fields remain mandatory: title, description (under 140 characters), published, date, tags, editor, dateCreated. Add these governance fields:
 
 - topic_id: stable identifier for the topic (e.g., dfda-technical-roadmap)
 - canonical: true | false (exactly one canonical per topic_id)

economic-models/dih-treasury-cash-flow-model.md

@@ -1,6 +1,6 @@
 ---
 title: DIH Treasury - Dynamic Cash Flow & Payout Model
-description: A 10-year projection modeling the DIH treasury's inflows based on two core principles: a target investor return of ~40% CAGR (~28x) and a mission guarantee that reserves at least 50% of income for DIH programs.
+description: "A 10-year cash flow model for the DIH treasury, balancing a ~40% CAGR target for investors with a 50% mission guarantee for DIH programs."
 published: true
 date: '2025-01-25T00:00:00.000Z'
 tags: financial-modeling, cash-flow, treasury-management, roi, victory-bonds, dynamic-payout