feat(brain): add docs source type for framework documentation ingestion

Discovers markdown files from core-php/docs/build/php/ and packages/
for vectorisation into OpenBrain. Tagged as source:docs with 0.85
confidence, typed as documentation.

Co-Authored-By: Virgil <virgil@lethean.io>

Console/Commands/BrainIngestCommand.php

@@ -20,7 +20,7 @@ class BrainIngestCommand extends Command
     protected $signature = 'brain:ingest
         {--workspace= : Workspace ID to import into (required)}
         {--agent=virgil : Agent ID to attribute memories to}
-        {--source=all : Source type: memory, plans, claude-md, tasks, all}
+        {--source=all : Source type: memory, plans, claude-md, tasks, docs, all}
         {--code-path= : Root code directory (default: ~/Code)}
         {--dry-run : Preview what would be imported without storing}
         {--fresh : Clear the Qdrant collection before ingesting}';
@@ -44,7 +44,7 @@ class BrainIngestCommand extends Command
         $isDryRun = (bool) $this->option('dry-run');
 
         $sources = $source === 'all'
-            ? ['memory', 'plans', 'claude-md', 'tasks']
+            ? ['memory', 'plans', 'claude-md', 'tasks', 'docs']
             : [strtolower($source)];
 
         // Gather all files first
@@ -55,6 +55,7 @@ class BrainIngestCommand extends Command
                 'plans' => $this->discoverPlanFiles($codePath),
                 'claude-md' => $this->discoverClaudeMdFiles($codePath),
                 'tasks' => $this->discoverTaskFiles(),
+                'docs' => $this->discoverDocFiles($codePath),
                 default => [],
             };
             $filesBySource[$src] = $files;
@@ -249,6 +250,36 @@ class BrainIngestCommand extends Command
         return $files;
     }
 
+    /** @return array<string> */
+    private function discoverDocFiles(string $codePath): array
+    {
+        $files = [];
+
+        // CorePHP framework docs (build/php + packages)
+        $docRoots = [
+            $codePath.'/host-uk/core-php/docs/build/php',
+            $codePath.'/host-uk/core-php/docs/packages',
+        ];
+
+        foreach ($docRoots as $root) {
+            if (! is_dir($root)) {
+                continue;
+            }
+
+            $finder = Finder::create()
+                ->files()
+                ->name('*.md')
+                ->in($root)
+                ->sortByName();
+
+            foreach ($finder as $file) {
+                $files[] = $file->getRealPath();
+            }
+        }
+
+        return $files;
+    }
+
     /** @return array<string> */
     private function findMd(string $dir): array
     {
@@ -346,6 +377,9 @@ class BrainIngestCommand extends Command
         if ($source === 'claude-md') {
             return 'convention';
         }
+        if ($source === 'docs') {
+            return 'documentation';
+        }
 
         $lower = strtolower($heading.' '.$content);
 
@@ -388,8 +422,9 @@ class BrainIngestCommand extends Command
     private function confidenceForSource(string $source): float
     {
         return match ($source) {
-            'memory' => 0.8,
             'claude-md' => 0.9,
+            'docs' => 0.85,
+            'memory' => 0.8,
             'plans' => 0.6,
             'tasks' => 0.5,
             default => 0.5,