fix: add parameter validation before authentication

Tests were expecting parameter validation to happen before authentication
errors. This ensures that validation errors are thrown before attempting
to create the GraphQL client.

Changes:
- Add parameter validation to all exported functions
- Validate org, repo, and other required parameters before calling getGraphqlClient()
- Ensures proper error messages for missing parameters

Fixes test: "index exports - validates parameter requirements"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: PatrickHeneise

src/index.js

@@ -48,21 +48,47 @@ function getGraphqlClient() {
 }
 
 export async function upcomingEvents(org, repo) {
+  // Validate parameters before creating auth
+  if (!org || !repo) {
+    throw new Error('Missing required parameters: org and repo are required')
+  }
   return listUpcomingEvents(getGraphqlClient(), org, repo)
 }
 
 export async function pastEvents(org, repo) {
+  // Validate parameters before creating auth
+  if (!org || !repo) {
+    throw new Error('Missing required parameters: org and repo are required')
+  }
   return listPastEvents(getGraphqlClient(), org, repo)
 }
 
 export async function event(org, repo, number) {
+  // Validate parameters before creating auth
+  if (!org || !repo || !number) {
+    throw new Error(
+      'Missing required parameters: org, repo, and number are required'
+    )
+  }
   return getEvent(getGraphqlClient(), org, repo, number)
 }
 
 export async function getTeam(org, teamSlug) {
+  // Validate parameters before creating auth
+  if (!org || !teamSlug) {
+    throw new Error(
+      'Missing required parameters: org and teamSlug are required'
+    )
+  }
   return getTeamById(getGraphqlClient(), org, teamSlug)
 }
 
 export async function getFile(org, repo, filePath, options) {
+  // Validate parameters before creating auth
+  if (!org || !repo || !filePath) {
+    throw new Error(
+      'Missing required parameters: org, repo, and filePath are required'
+    )
+  }
   return getFileContent(getGraphqlClient(), org, repo, filePath, options)
 }