fix(analyzer): C-style inline block comments cause infinite comment counting, and python async functions are missed

[CodeMaverick-143]

Problem Description

1. C-Style Inline Comments (/* ... */):
   In insight/analyzer.py:

   elif "/*" in line:
       in_block_comment = True
       comment_count += 1
   elif "*/" in line:
       in_block_comment = False
       comment_count += 1
   elif in_block_comment:
       comment_count += 1

   If a single line contains an inline block comment such as int count = 0; /* inline */, the "/*" in line branch executes, setting in_block_comment = True. Because elif "*/" in line is an elif, the closing delimiter on that same line is never checked! in_block_comment remains True for the remainder of the file, causing all subsequent executable lines to be counted as comments.

2. Async Functions Ignored:
   In analyzer.py:55-56:

   if isinstance(node, ast.FunctionDef):
       stats["functions"] += 1

   In Python, async def my_func() generates an ast.AsyncFunctionDef AST node. Modern asynchronous functions are completely ignored.

3. Relative Imports Returning None:
   In analyzer.py:61-62:

   elif isinstance(node, ast.ImportFrom):
       stats["imports"].append(node.module)

   For relative imports like from . import utils, node.module is None. Appending None to stats["imports"] can cause unexpected TypeError or render literal None in reports.

Affected Files

• insight/analyzer.py:38-66

Proposed Solution

1. Check for single-line block comments ("/*" in line and "*/" in line) before toggling block state.
2. Check for ast.AsyncFunctionDef:

   if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
       stats["functions"] += 1

3. Handle relative imports when node.module is None (e.g. use f".{node.names[0].name}" or ".").

[mikemikimike]

Implemented in PR #38.

• Inline C-style block comments now close on the same line and no longer cause following executable lines to be counted as comments.
• Python async def functions are now included in function statistics.
• Relative imports without a module name are represented by their dot level instead of None.
• Added regression tests for all three analyzer behaviors.

Local verification passed:

• pytest tests/: 3 passed
• Python bytecode compilation for setup.py and all insight/*.py modules
• import insight
• Targeted Ruff checks for the changed code and tests

The GitHub Actions CI run is action_required with zero jobs for this fork pull request, so it is blocked before execution by the upstream fork-approval policy. The upstream baseline also has existing Ruff findings unrelated to this change.