docs: mermaid flow + archify architecture map, published to maps site

- docs/obsidian-sorter-flow.mmd + rendered PNG
- docs/archify/*.architecture.json (validation: 0 errors, 0 warnings)
- docs/obsidian-sorter-map.html (interactive, showcase quality)
- published to https://maps.lab.audasmedia.com.au/obsidian-sorter/docs/

docs/obsidian-sorter-flow.mmd

@@ -0,0 +1,16 @@
+flowchart LR
+    A["Sam writes a note"] --> B["010 inbox/"]
+    B --> C{"Watcher<br/>systemd user service<br/>polls every 10s"}
+    C --> D["Tier 1 - rules<br/>folder + keyword hints<br/>user tags win"]
+    D -->|"confident"| F["Proposal"]
+    D -->|"unsure"| E["Tier 2 - TypeSafe JEV<br/>bucket + folder + tags"]
+    E --> F
+    F --> G["Proposal written<br/>into the note frontmatter"]
+    G --> H["Sam reviews in Obsidian"]
+    H -->|"ticks approved"| I["Writer"]
+    H -->|"edits folder first"| G
+    I --> J["Destination folder"]
+    I --> K["Table of Contents"]
+
+    click C "https://maps.lab.audasmedia.com.au/obsidian-sorter/docs/obsidian-sorter-map.html" "View Archify Map"
+    click E "https://docs.typesafe.ai" "TypeSafe JEV documentation"