Fix bin/publish: copy docs.dist from project root

Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/RSpade/SchemaQuality/Rules/SessionIdForeignKeyRule.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\RSpade\SchemaQuality\Rules;
+
+class SessionIdForeignKeyRule extends Schema_Rule_Abstract
+{
+    public function get_id(): string
+    {
+        return 'SCHEMA-FK-01';
+    }
+    
+    public function get_name(): string
+    {
+        return 'Session ID Foreign Key Rule';
+    }
+    
+    public function get_description(): string
+    {
+        return 'Ensures session_id columns have proper foreign key constraints to sessions.id with ON DELETE CASCADE';
+    }
+    
+    public function check(array $schema): void
+    {
+        foreach ($schema['tables'] as $table_name => $table_info) {
+            if ($this->is_excluded_table($table_name)) {
+                continue;
+            }
+            
+            // Check each column for session_id
+            foreach ($table_info['columns'] as $column) {
+                if ($column['name'] === 'session_id') {
+                    // Check if nullable
+                    if ($column['nullable'] !== 'YES') {
+                        $this->add_violation(
+                            $table_name,
+                            'session_id',
+                            'Column session_id must be nullable',
+                            'ALTER TABLE ' . $table_name . ' MODIFY session_id VARCHAR(255) NULL'
+                        );
+                    }
+                    
+                    // Check for foreign key
+                    $has_proper_fk = false;
+                    foreach ($table_info['foreign_keys'] as $fk) {
+                        if ($fk['column'] === 'session_id' && 
+                            $fk['referenced_table'] === 'sessions' && 
+                            $fk['referenced_column'] === 'id' &&
+                            $fk['delete_rule'] === 'CASCADE') {
+                            $has_proper_fk = true;
+                            break;
+                        }
+                    }
+                    
+                    if (!$has_proper_fk) {
+                        $this->add_violation(
+                            $table_name,
+                            'session_id',
+                            'Column session_id must have foreign key to sessions.id with ON DELETE CASCADE',
+                            'ALTER TABLE ' . $table_name . ' ADD CONSTRAINT fk_' . $table_name . '_session ' .
+                            'FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE'
+                        );
+                    }
+                }
+            }
+        }
+    }
+}