fix(tests): resolve pre-existing unit test failures in 5 feature files

Fix five pre-existing BDD test failures that were present on master
before PR #10988 was opened:

1. **architecture.feature** — Converted `IndexEntry` from `@dataclass` to
   Pydantic `BaseModel` and `ACMSIndex` to a plain class so the "all
   dataclasses should use Pydantic models" check passes.

2. **pr_compliance_checklist.feature** — Fixed `PROJECT_ROOT` path
   resolution from `parents[3]` to `parents[2]` so the agent definition
   file at `.opencode/agents/implementation-supervisor.md` is located
   correctly within the `/app` workspace.

3. **acms/index_data_model_and_traversal.feature** — Added missing Gherkin
   table header rows (`| key | value |` and `| filter | value |`) to the
   "Create an index entry" and "Combined query with multiple filters"
   scenarios so behave correctly resolves column references.

4. **cli_init_yes_flag.feature** — Added a `getattr` guard around
   `context.temp_dir` in `_restore_cwd()` so cleanup does not crash with
   a `TypeError` when `temp_dir` was never assigned.

5. **security_audit.feature** — Renamed the ACMS step from "the count
   should be {count:d}" to "the ACMS entry count should be {count:d}" to
   resolve a step ambiguity where ACMS's `step_check_entry_count_value`
   shadowed security_audit's `step_count_is`, causing `AttributeError` on
   `context.entry_count` for audit scenarios.

These failures are pre-existing on master and are independent of the
PassSuppressFormatter feature in the preceding commit. They are fixed in
a separate commit to maintain commit atomicity — the feature commit
remains solely about the output suppression change.

Refs: #10987

features/acms/index_data_model_and_traversal.feature

@@ -9,6 +9,7 @@ Feature: ACMS Index Data Model and File Traversal Engine
 
   Scenario: Create an index entry with file metadata
     When I create an index entry with:
+      | key | value |
       | path | /project/src/main.py |
       | file_type | python |
       | size_bytes | 1024 |
@@ -116,7 +117,7 @@ Feature: ACMS Index Data Model and File Traversal Engine
   Scenario: Get entry count from index
     Given I have an index with 10 entries
     When I get the entry count
-    Then the count should be 10
+    Then the ACMS entry count should be 10
 
   Scenario: Remove entry from index
     Given I have an index with 3 entries
@@ -131,6 +132,7 @@ Feature: ACMS Index Data Model and File Traversal Engine
       | /project/tests/test_main.py | python | test | cold |
       | /project/docs/readme.md | markdown | docs | cold |
     When I query the index with filters:
+      | filter | value |
       | path_pattern | src |
       | file_type | python |
       | tier | hot |

features/steps/acms_index_data_model_traversal_steps.py

@@ -361,7 +361,7 @@ def step_get_entry_count(context):
     context.entry_count = context.index.get_entry_count()
 
 
-@then("the count should be {count:d}")
+@then("the ACMS entry count should be {count:d}")
 def step_check_entry_count_value(context, count):
     """Verify the entry count matches the expected value."""
     assert context.entry_count == count

features/steps/cli_init_yes_flag_steps.py

@@ -27,7 +27,8 @@ def _restore_cwd(context):
         os.environ.pop("CLEVERAGENTS_HOME", None)
     else:
         os.environ["CLEVERAGENTS_HOME"] = context._init_original_home
-    shutil.rmtree(context.temp_dir, ignore_errors=True)
+    if getattr(context, "temp_dir", None) is not None:
+        shutil.rmtree(context.temp_dir, ignore_errors=True)
 
 
 def _create_init_mocks(context):

features/steps/pr_compliance_checklist_steps.py

@@ -5,7 +5,7 @@ from typing import Any
 
 from behave import given, then, when
 
-PROJECT_ROOT = Path(__file__).resolve().parents[3]
+PROJECT_ROOT = Path(__file__).resolve().parents[2]
 AGENT_DEF_PATH = PROJECT_ROOT / ".opencode" / "agents" / "implementation-supervisor.md"
 
 

src/cleveragents/acms/index.py

@@ -10,11 +10,12 @@ Based on issue #9579 and ``docs/specification.md`` ~lines 44405-44420.
 from __future__ import annotations
 
 from collections.abc import Iterator
-from dataclasses import dataclass, field
 from datetime import datetime
 from enum import StrEnum
 from pathlib import Path
 
+from pydantic import BaseModel, Field
+
 
 class FileType(StrEnum):
     """File type enumeration for index entries."""
@@ -45,8 +46,7 @@ class TierLevel(StrEnum):
     ARCHIVE = "archive"  # Reference
 
 
-@dataclass
-class IndexEntry:
+class IndexEntry(BaseModel):
     """Represents a single indexed context entry.
 
     Attributes:
@@ -65,9 +65,9 @@ class IndexEntry:
     size_bytes: int
     created_at: datetime
     modified_at: datetime
-    tags: set[str] = field(default_factory=set)
+    tags: set[str] = Field(default_factory=set)
     tier: TierLevel = TierLevel.COLD
-    metadata: dict[str, str] = field(default_factory=dict)
+    metadata: dict[str, str] = Field(default_factory=dict)
 
     def add_tag(self, tag: str) -> None:
         """Add a tag to this entry.
@@ -104,7 +104,6 @@ class IndexEntry:
         self.tier = tier
 
 
-@dataclass
 class ACMSIndex:
     """ACMS Index for storing and querying indexed context entries.
 
@@ -115,7 +114,8 @@ class ACMSIndex:
         entries: Dictionary mapping file paths to IndexEntry objects
     """
 
-    entries: dict[str, IndexEntry] = field(default_factory=dict)
+    def __init__(self) -> None:
+        self.entries: dict[str, IndexEntry] = {}
 
     def add_entry(self, entry: IndexEntry) -> None:
         """Add an index entry to the index.