feat(telemetry): Integrate telemetry for expand-all, aggregate results

This commit implements AI usage telemetry for the `expand-all-tasks` command/tool and refactors its CLI output for clarity and consistency.

Key Changes:

1.  **Telemetry Integration for `expand-all-tasks` (Subtask 77.8):**\n    -   The `expandAllTasks` core logic (`scripts/modules/task-manager/expand-all-tasks.js`) now calls the `expandTask` function for each eligible task and collects the individual `telemetryData` returned.\n    -   A new helper function `_aggregateTelemetry` (in `utils.js`) is used to sum up token counts and costs from all individual expansions into a single `telemetryData` object for the entire `expand-all` operation.\n    -   The `expandAllTasksDirect` wrapper (`mcp-server/src/core/direct-functions/expand-all-tasks.js`) now receives and passes this aggregated `telemetryData` in the MCP response.\n    -   For CLI usage, `displayAiUsageSummary` is called once with the aggregated telemetry.

2.  **Improved CLI Output for `expand-all`:**\n    -   The `expandAllTasks` core function now handles displaying a final "Expansion Summary" box (showing Attempted, Expanded, Skipped, Failed counts) directly after the aggregated telemetry summary.\n    -   This consolidates all summary output within the core function for better flow and removes redundant logging from the command action in `scripts/modules/commands.js`.\n    -   The summary box border is green for success and red if any expansions failed.

3.  **Code Refinements:**\n    -   Ensured `chalk` and `boxen` are imported in `expand-all-tasks.js` for the new summary box.\n    -   Minor adjustments to logging messages for clarity.

tasks/task_055.txt

@@ -48,3 +48,35 @@ Testing should verify both the new positional argument functionality and continu
    - Verify examples in documentation show both styles where appropriate
 
 All tests should pass with 100% of commands supporting both argument styles without any regression in existing functionality.
+
+# Subtasks:
+## 1. Analyze current CLI argument parsing structure [pending]
+### Dependencies: None
+### Description: Review the existing CLI argument parsing code to understand how arguments are currently processed and identify integration points for positional arguments.
+### Details:
+Document the current argument parsing flow, identify key classes and methods responsible for argument handling, and determine how named arguments are currently processed. Create a technical design document outlining the current architecture and proposed changes.
+
+## 2. Design positional argument specification format [pending]
+### Dependencies: 55.1
+### Description: Create a specification for how positional arguments will be defined in command definitions, including their order, required/optional status, and type validation.
+### Details:
+Define a clear syntax for specifying positional arguments in command definitions. Consider how to handle mixed positional and named arguments, default values, and type constraints. Document the specification with examples for different command types.
+
+## 3. Implement core positional argument parsing logic [pending]
+### Dependencies: 55.1, 55.2
+### Description: Modify the argument parser to recognize and process positional arguments according to the specification, while maintaining compatibility with existing named arguments.
+### Details:
+Update the parser to identify arguments without flags as positional, map them to the correct parameter based on order, and apply appropriate validation. Ensure the implementation handles missing required positional arguments and provides helpful error messages.
+
+## 4. Handle edge cases and error conditions [pending]
+### Dependencies: 55.3
+### Description: Implement robust handling for edge cases such as too many/few arguments, type mismatches, and ambiguous situations between positional and named arguments.
+### Details:
+Create comprehensive error handling for scenarios like: providing both positional and named version of the same argument, incorrect argument types, missing required positional arguments, and excess positional arguments. Ensure error messages are clear and actionable for users.
+
+## 5. Update documentation and create usage examples [pending]
+### Dependencies: 55.2, 55.3, 55.4
+### Description: Update CLI documentation to explain positional argument support and provide clear examples showing how to use positional arguments with different commands.
+### Details:
+Revise user documentation to include positional argument syntax, update command reference with positional argument information, and create example command snippets showing both positional and named argument usage. Include a migration guide for users transitioning from named-only to positional arguments.
+