fix: use run.executable instead of activatedRun.executable for interpreter identification (#949)

getInterpreterDetails, getSettingsPythonPath, and getExecutableCommand need
the actual Python binary path, not the activated run command. Using
activatedRun.executable breaks when environment managers set it to a wrapper
command (e.g. pixi run ... python).

This unblocks managers like conda and pixi from using wrapper commands in activatedRun without
breaking the debugger, while remaining backwards-compatible since the two
values are currently identical for all existing managers.

Author: renan-r-santos

src/extension/common/python.ts

@@ -133,7 +133,7 @@ export async function getSettingsPythonPath(resource?: Uri): Promise<string[] |
             return undefined;
         }
 
-        const runConfig = execInfo.activatedRun ?? execInfo.run;
+        const runConfig = execInfo.run;
         traceLog(
             `getSettingsPythonPath: Using executable='${runConfig.executable}' args='${
                 runConfig.args?.join(' ') || ''
@@ -255,9 +255,7 @@ export async function getInterpreterDetails(resource?: Uri): Promise<IInterprete
         const env: PythonEnvironment | undefined = await api.getEnvironment(resource);
         // resolve the environment to get full details
         const resolvedEnv = env ? await api.resolveEnvironment(env?.environmentPath) : undefined;
-        const executablePath = resolvedEnv?.execInfo.activatedRun?.executable
-            ? resolvedEnv.execInfo.activatedRun.executable
-            : resolvedEnv?.execInfo.run.executable;
+        const executablePath = resolvedEnv?.execInfo.run.executable;
 
         const a: IInterpreterDetails = {
             path: executablePath ? [executablePath] : undefined,

src/extension/debugger/adapter/factory.ts

@@ -193,7 +193,7 @@ export class DebugAdapterDescriptorFactory implements IDebugAdapterDescriptorFac
      */
     private async getExecutableCommand(interpreter: PythonEnvironment | undefined): Promise<string[]> {
         if (interpreter) {
-            const executablePath = interpreter.execInfo.activatedRun?.executable ?? interpreter.execInfo.run.executable;
+            const executablePath = interpreter.execInfo.run.executable;
             const version = interpreter.version;
 
             // Parse version string (e.g., "3.8.10" -> major: 3, minor: 8)