test(coverage): add Behave BDD tests to improve unit test coverage across 53 source modules

Add 53 new .feature files and corresponding step definition files targeting
uncovered lines identified in build/coverage.xml. Fix AmbiguousStep conflicts
in 7 pre-existing step files by disambiguating step text.

New tests cover: ACP clients/facade, actor CLI/config, application container,
ACMS service/strategies, async worker, automation profile CLI, autonomy
guardrail, bridge, change model, config CLI/service, context service,
cross-plan correction, database models, decision service, decomposition
clustering/service, discovery handler, langchain chat provider, langgraph
nodes, materializers, multi-project service, plan apply/CLI/lifecycle/model/
preflight/resume/service, PostgreSQL analyzer, project CLI/context CLI,
provider registry, reactive application/route, repositories, resolver handler,
resource registry service, resume model, retry patterns, sandbox protocol,
server CLI, skill CLI/service, skills registry, subplan execution/service,
system CLI, UKO loader, UoW, and YAML template engine.

Closes #645

features/project_cli_coverage_r2.feature

@@ -0,0 +1,61 @@
+Feature: Project CLI coverage round 2 – remaining uncovered lines
+  As a developer
+  I want to exercise the remaining uncovered code paths in project.py
+  So that lines 73-76, 81-84, 89-92, 152, 164, 167, and 843 are covered
+
+  Background:
+    Given the r2 project CLI mocks are prepared
+
+  # ── _get_namespaced_project_repo helper (lines 73, 75, 76) ──
+
+  Scenario: _get_namespaced_project_repo returns repo from the DI container
+    When I call the actual _get_namespaced_project_repo helper with a mocked container
+    Then the r2 helper result should be the mock namespaced project repo
+
+  # ── _get_resource_link_repo helper (lines 81, 83, 84) ──
+
+  Scenario: _get_resource_link_repo returns link repo from the DI container
+    When I call the actual _get_resource_link_repo helper with a mocked container
+    Then the r2 helper result should be the mock resource link repo
+
+  # ── _get_resource_registry_service helper (lines 89, 91, 92) ──
+
+  Scenario: _get_resource_registry_service returns registry from the DI container
+    When I call the actual _get_resource_registry_service helper with a mocked container
+    Then the r2 helper result should be the mock resource registry service
+
+  # ── _project_spec_dict fallback for linked_at without isoformat (line 152) ──
+
+  Scenario: _project_spec_dict uses str fallback when linked_at has no isoformat
+    Given a mock project with a linked resource whose linked_at is a plain string
+    When I call _project_spec_dict on that project
+    Then the linked resource linked_at should be the plain string value
+
+  # ── _project_spec_dict fallback for created_at without isoformat (line 164) ──
+
+  Scenario: _project_spec_dict uses str fallback when created_at has no isoformat
+    Given a mock project whose created_at is a plain string
+    When I call _project_spec_dict on that project
+    Then the result created_at should be the plain string value
+
+  # ── _project_spec_dict fallback for updated_at without isoformat (line 167) ──
+
+  Scenario: _project_spec_dict uses str fallback when updated_at has no isoformat
+    Given a mock project whose updated_at is a plain string
+    When I call _project_spec_dict on that project
+    Then the result updated_at should be the plain string value
+
+  # ── Combined: all three date fallbacks in one project with linked resources ──
+
+  Scenario: _project_spec_dict handles all string dates together with linked resources
+    Given a mock project where all dates and linked_at are plain strings
+    When I call _project_spec_dict on that project
+    Then all date fields in the result should be plain string values
+
+  # ── list_projects rich table fallback for created_at without strftime (line 843) ──
+
+  Scenario: list command renders table when project created_at is a plain string
+    Given the r2 project repo returns projects with string created_at values
+    When I invoke the r2 CLI list command with rich format
+    Then the r2 CLI output should contain the truncated string date
+    And the r2 CLI exit code should be 0