docs: add fieldnote template with frontmatter schema

docs/fieldnote-template.md

@@ -0,0 +1,58 @@
+# Fieldnote Template
+
+Use this template when creating new fieldnotes.
+
+## Frontmatter
+
+```yaml
+---
+title: "FIELDNOTE — Your Title Here"
+date: YYYY-MM-DD
+author: "Mark Randall Havens"
+type: fieldnote
+status: published
+version: 1.0
+series: "Series Name"
+layer: first|second|third|fourth
+tags: tag1, tag2, tag3
+notion_id: ""
+notion_created: ""
+source: Notion
+---
+```
+
+## Fields Explained
+
+| Field | Required | Description |
+|-------|----------|-------------|
+| title | Yes | Full title with emoji prefix |
+| date | Yes | Original creation date (YYYY-MM-DD) |
+| author | Yes | Author name |
+| type | Yes | fieldnote, codex, essay, etc. |
+| status | Yes | draft, published, archived |
+| version | No | Version number |
+| series | No | Series this belongs to |
+| layer | No | First, second, third, fourth |
+| tags | No | Comma-separated tags |
+| notion_id | No | Notion page ID if synced |
+| notion_created | No | Original Notion creation date |
+| source | No | Source system (Notion, etc.) |
+
+## Example
+
+```yaml
+---
+title: "FIELDNOTE — The Fourth Layer"
+date: 2025-10-21
+author: "Mark Randall Havens"
+type: fieldnote
+status: published
+version: 1.0
+series: "Trans-Recursive Currents"
+layer: fourth
+tags: recursion, coherence, integration
+notion_id: "293ef9407594806a8595d1f6e4d1cba2"
+notion_created: "2025-10-21T02:11:00.000Z"
+source: Notion
+---
+```