chore: ignore obsidian graph settings and update default graph scale

.gitignore

@@ -22,6 +22,7 @@ scripts/mattermost/generated/*
 /.obsidian/
 project-knowledge/.obsidian/workspace*.json
 project-knowledge/.obsidian/workspace-mobile*.json
+project-knowledge/.obsidian/graph.json
 project-knowledge/.obsidian/hotkeys.json
 project-knowledge/.obsidian/community-plugins.json
 project-knowledge/.obsidian/plugins/

project-knowledge/.obsidian/graph.json

@@ -1,65 +0,0 @@
-{
-  "collapse-filter": true,
-  "search": "-path:generated -path:.venv -path:08-bases -path:09-templates -file:index -file:README -file:AGENTS -file:SKILL",
-  "showTags": false,
-  "showAttachments": false,
-  "hideUnresolved": false,
-  "showOrphans": false,
-  "collapse-color-groups": true,
-  "colorGroups": [
-    {
-      "query": "tag:#onboarding",
-      "color": {
-        "a": 1,
-        "rgb": 14701138
-      }
-    },
-    {
-      "query": "tag:#map",
-      "color": {
-        "a": 1,
-        "rgb": 6732650
-      }
-    },
-    {
-      "query": "path:02-work-items",
-      "color": {
-        "a": 1,
-        "rgb": 16753920
-      }
-    },
-    {
-      "query": "path:04-people",
-      "color": {
-        "a": 1,
-        "rgb": 10053324
-      }
-    },
-    {
-      "query": "path:05-decisions",
-      "color": {
-        "a": 1,
-        "rgb": 16733525
-      }
-    },
-    {
-      "query": "path:03-context/systems OR path:03-context/workstreams",
-      "color": {
-        "a": 1,
-        "rgb": 5793266
-      }
-    }
-  ],
-  "collapse-display": true,
-  "showArrow": false,
-  "textFadeMultiplier": 0,
-  "nodeSizeMultiplier": 1,
-  "lineSizeMultiplier": 1,
-  "collapse-forces": true,
-  "centerStrength": 0.518713248970312,
-  "repelStrength": 10,
-  "linkStrength": 1,
-  "linkDistance": 250,
-  "scale": 5.865886234269105,
-  "close": true
-}