fix(agents): the claude projects root follows CLAUDE_CONFIG_DIR too (Issue #31, review)

stop resolves the uuid before it purges, through lib.sh's exported
CLAUDE_PROJECT_DIR and DiscoveryContext.claude_dir, both of which defaulted
to $HOME/.claude/projects. With CLAUDE_CONFIG_DIR alone the transcript under
<cfg>/projects was not found, so stop removed the row and purged nothing.
Both defaults are now ${CLAUDE_CONFIG_DIR:-<home>/.claude}/projects; an
explicit CLAUDE_PROJECT_DIR still wins.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.agents/skills/lib_py/agents/adapters/claude.py

@@ -11,8 +11,8 @@ def _config_dir(ctx: DiscoveryContext) -> str:
 
 
 def _projects_dirs(ctx: DiscoveryContext) -> list:
-    """ctx.claude_dir (CLAUDE_PROJECT_DIR, else <home>/.claude/projects) and
-    the config root's own projects/, each once."""
+    """ctx.claude_dir (CLAUDE_PROJECT_DIR, else the config root's projects/)
+    and the config root's own projects/, each once."""
     dirs, seen = [], set()
     for d in (ctx.claude_dir, os.path.join(_config_dir(ctx), "projects")):
         real = os.path.realpath(d)