fix(changelog): merge duplicate ### Fixed and ### Added sections in [Unreleased]

Per Keep a Changelog specification, each version block must have exactly
one instance of each sub-header type (Added/Changed/Fixed/Security). Multiple
duplicate ### Fixed (5 instances) and ### Added (4 instances) within the
[Unreleased] section were consolidated into single headers. All content is
preserved — only duplicate header lines are removed.

ISSUES CLOSED: #11015

CHANGELOG.md

@@ -277,7 +277,6 @@ Changed `wf10_batch.robot` to be less likely to create files, and
   versions (<3.13.4) cannot be installed even if upstream transitive dependencies have loose
   version constraints.
 
-### Fixed
 
 - **Error suppression removed from `reactive_registry_adapter.py`** (#9060): Removed two `try...except Exception:` blocks in `register_registry_agents()` that silently suppressed errors, violating the CONTRIBUTING.md fail-fast policy. Exceptions from `actor_registry.list_actors()` and the route bridge refresh now propagate to the caller instead of being swallowed. Added Behave scenarios verifying RuntimeError, AttributeError, and TypeError propagation.
 
@@ -337,7 +336,6 @@ _ALL_DATA_COLUMNS + ") " "SELECT " + _ALL_DATA_COLUMNS + " FROM v3_plans"`.
   example outputs now reflect comprehensive provider coverage with accurate warning
   counts and per-provider recommendations.
 
-### Added
 
 - `agents actor context clear` command to reset actor message history and
   state while preserving the underlying context directory via `ContextManager`
@@ -388,7 +386,6 @@ _ALL_DATA_COLUMNS + ") " "SELECT " + _ALL_DATA_COLUMNS + " FROM v3_plans"`.
   registration in bootstrap builtin types and updated `_resource_registry_data.py`
   to recognize database resource categories.
 
-### Fixed
 
 - **`invariant_enforced` decisions not propagated to child plans on subplan spawn** (#9131):
   Fixed `SubplanService.spawn()` to propagate all `invariant_enforced` decisions from the
@@ -613,7 +610,6 @@ uko-oo:Class` triple emission in `PythonAnalyzer._extract_class()` so that
   message listing available built-in profiles. The resolved profile name is also
   logged at debug level for observability.
 
-### Added
 
 - **ACMS Index Data Model and File Traversal Engine** (#9579): Implements the
   foundational ACMS index data model with structured fields for file metadata
@@ -846,7 +842,6 @@ Documentation Report (Cycle N)` issues every 10 cycles (~3.3 hours). The manager
   model description, and two milestone acceptance criteria to reflect the corrected blocking
   behavior for empty validation summaries and no-attachment runs.
 
-### Fixed
 
 - **Plan Concurrency Race Condition** (#7989): Fixed critical race condition in `execute_plan()` and
   `apply_plan()` where concurrent CLI/worker sessions could simultaneously modify the same plan,
@@ -959,7 +954,6 @@ iteration` and data corruption under concurrent plan execution. All public
 
 ---
 
-### Fixed
 
 - **CLI (`agents actor remove`)** (#6491): Restores output parity with the
   other actor commands by honoring `--format`/`-f` for JSON/YAML/plain/Rich