fix: 修复4个cron wrapper脚本（空格缺失+缺失文件）

- skill-manager-scan.sh: scan 后加换行符
- optimizer-report.sh: 同上
- proactive-learning-report.sh: 同上
- stock_learning.sh: 新建（stock_learning.py 的 wrapper）

scripts/optimizer-report.sh

@@ -1,2 +1,2 @@
 #!/bin/bash
-cd ~/.hermes/scripts && python3 optimizer.py report
+cd ~/.hermes/scripts && python3 optimizer.py report

scripts/proactive-learning-report.sh

@@ -1,2 +1,2 @@
 #!/bin/bash
-cd ~/.hermes/scripts && python3 proactive_learning.py report
+cd ~/.hermes/scripts && python3 proactive_learning.py report

scripts/skill-manager-scan.sh

@@ -1,2 +1,2 @@
 #!/bin/bash
-python3 ~/.hermes/scripts/skill-manager.py scan
+python3 ~/.hermes/scripts/skill-manager.py scan

scripts/stock_learning.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+cd ~/.hermes/scripts && python3 stock_learning.py report