fix: improve audit command implementation

- Remove unused audit_click_group import
- Add path existence validation to scan/fix/check options
- Move agent_centric import to module level for performance
- Use Typer Path type with exists=True validation

Co-authored-by: Mervin Praison <MervinPraison@users.noreply.github.com>

Author: praisonai-triage-agent[bot]

src/praisonai/praisonai/cli/app.py

@@ -6,6 +6,7 @@
 
 from enum import Enum
 from typing import Optional
+from pathlib import Path
 
 import typer
 
@@ -310,7 +311,7 @@ def register_commands():
     from .commands.profile import app as profile_app
     from .commands.benchmark import app as benchmark_app
     from .commands.paths import app as paths_app
-    from .commands.audit import audit as audit_click_group
+    from .commands.audit import agent_centric
 
     # Import new command modules - Previously legacy-only commands
     from .commands.chat import app as chat_app
@@ -400,9 +401,9 @@ def register_commands():
 
     @audit_typer.command("agent-centric")
     def audit_agent_centric(
-        scan: str = typer.Option(None, "--scan", help="Scan path for compliance"),
-        fix: str = typer.Option(None, "--fix", help="Fix non-compliant files"),
-        check: str = typer.Option(None, "--check", help="Check and fail if non-compliant"),
+        scan: Optional[Path] = typer.Option(None, "--scan", exists=True, help="Scan path for compliance"),
+        fix: Optional[Path] = typer.Option(None, "--fix", exists=True, help="Fix non-compliant files"),
+        check: Optional[Path] = typer.Option(None, "--check", exists=True, help="Check and fail if non-compliant"),
         json_output: bool = typer.Option(False, "--json", help="Output as JSON"),
         line_limit: int = typer.Option(40, "--line-limit", help="Line limit for header scan"),
         only_examples: bool = typer.Option(False, "--only-examples", help="Only scan Python examples"),
@@ -411,11 +412,10 @@ def audit_agent_centric(
     ):
         """Audit agent-centric compliance for examples and docs."""
         # Call the original Click function directly
-        from .commands.audit import agent_centric
         agent_centric.callback(
-            scan_path=scan,
-            fix_path=fix,
-            check_path=check,
+            scan_path=str(scan) if scan else None,
+            fix_path=str(fix) if fix else None,
+            check_path=str(check) if check else None,
             output_json=json_output,
             line_limit=line_limit,
             only_examples=only_examples,