fix(cli): resolve CI failures and reviewer feedback for ACMS context CLI commands

- Fix integration test failure: Context Show Validates Empty View Name
  - typer.Exit is click.Exit (RuntimeError subclass), not SystemExit
  - Robot helper now catches typer.Exit using exit_code attribute
  - Helper path insertion now always places clone src at sys.path[0]
    to prevent /app/src from shadowing the PR branch source
- Fix information disclosure: CleverAgentsError handler now logs
  exception internally via _logger.exception() and shows generic
  user-facing message instead of str(e)
- Fix budget utilization: use actual per-tier token counts instead
  of hot_count * 100 (fragment count * arbitrary factor)
- Fix type safety: _remove_fragments now uses _TierServiceProtocol
  instead of object, enabling proper static type checking
- Fix overly broad except: cancellation handled with early return
  instead of catching typer.Exit(0) in the except block
- Add broad glob pattern warning when --path matches > 50 entries
- Remove duplicate HAL 9000 entry from CONTRIBUTORS.md
- Fix Behave steps to catch typer.Exit in addition to SystemExit

ISSUES CLOSED: #9586

robot/helper_acms_context_cli.py

@@ -24,13 +24,18 @@ from typing import Any
 from unittest.mock import MagicMock, patch
 
 _SRC = str(Path(__file__).resolve().parents[1] / "src")
-if _SRC not in sys.path:
-    sys.path.insert(0, _SRC)
+# Always insert at position 0 to ensure the clone's source takes precedence
+# over any other cleveragents installation (e.g., /app/src from the environment)
+if _SRC in sys.path:
+    sys.path.remove(_SRC)
+sys.path.insert(0, _SRC)
 
 _FEATURES = str(Path(__file__).resolve().parents[1])
-if _FEATURES not in sys.path:
-    sys.path.insert(0, _FEATURES)
+if _FEATURES in sys.path:
+    sys.path.remove(_FEATURES)
+sys.path.insert(0, _FEATURES)
 
+import typer  # noqa: E402
 from features.mocks.acms_context_mocks import (  # noqa: E402
     make_mock_container,
     make_mock_tier_service,
@@ -88,6 +93,8 @@ def _run_show(
         exit_code = 0
         try:
             acms_context_show(view)
+        except typer.Exit as exc:
+            exit_code = exc.exit_code if exc.exit_code is not None else 0
         except SystemExit as exc:
             exit_code = exc.code if exc.code is not None else 0
 
@@ -125,6 +132,8 @@ def _run_clear(
         exit_code = 0
         try:
             acms_context_clear(path=path, tag=tag, tier=tier, yes=yes)
+        except typer.Exit as exc:
+            exit_code = exc.exit_code if exc.exit_code is not None else 0
         except SystemExit as exc:
             exit_code = exc.code if exc.code is not None else 0