Fix #479: Remove hardcoded ~/.hermes paths from optional-skills

Fixed two optional-skill scripts that still hardcoded ~/.hermes:
- memento_cards.py: Changed from Path.home() / '.hermes' to proper
  HERMES_HOME expansion
- telephony.py: Changed from '~/.hermes' string to proper expansion

Both now use a _hermes_home() helper that:
1. Reads HERMES_HOME env var
2. Expands ~ if present in the path
3. Falls back to Path.home() / '.hermes' if not set

The migration script (openclaw_to_hermes.py) was left as-is per issue
recommendation since it intentionally references old paths.

Fixes #479

optional-skills/productivity/memento-flashcards/scripts/memento_cards.py

@@ -15,7 +15,16 @@ import uuid
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
-_HERMES_HOME = Path(os.environ.get("HERMES_HOME", Path.home() / ".hermes"))
+
+def _get_hermes_home() -> Path:
+    """Return HERMES_HOME, expanding ~ if needed."""
+    raw = os.environ.get("HERMES_HOME", "")
+    if raw:
+        return Path(raw).expanduser()
+    return Path.home() / ".hermes"
+
+
+_HERMES_HOME = _get_hermes_home()
 DATA_DIR = _HERMES_HOME / "skills" / "productivity" / "memento-flashcards" / "data"
 CARDS_FILE = DATA_DIR / "cards.json"
 

optional-skills/productivity/telephony/scripts/telephony.py

@@ -69,7 +69,11 @@ class OwnedTwilioNumber:
 
 
 def _hermes_home() -> Path:
-    return Path(os.environ.get("HERMES_HOME", "~/.hermes")).expanduser()
+    """Return HERMES_HOME, expanding ~ if needed."""
+    raw = os.environ.get("HERMES_HOME", "")
+    if raw:
+        return Path(raw).expanduser()
+    return Path.home() / ".hermes"
 
 
 def _env_path() -> Path: