Fix Discord validation errors by making discordProfile fields optional

[Copilot]

This PR fixes a Zod validation error that occurs when users authenticate with Discord but have incomplete profile data. The error manifests as:

ZodError: [
  {
    "code": "invalid_type",
    "expected": "string",
    "received": "undefined",
    "path": ["discordProfile", "nick"],
    "message": "Required"
  },
  {
    "code": "invalid_type",
    "expected": "object", 
    "received": "undefined",
    "path": ["discordProfile", "user"],
    "message": "Required"
  }
]

Root Cause

The validation schema in @epic-web/workshop-utils requires discordProfile.nick and discordProfile.user to be present when a discordProfile object exists. However, the Epic API sometimes returns a discordProfile object with undefined values for these fields when Discord integration is incomplete or partially configured.

Solution

Applied a patch to make the nick and user fields optional within the discordProfile schema:

• nick: z.string().nullable() → nick: z.string().nullable().optional()
• user: z.object({...}) → user: z.object({...}).optional()

This follows the same pattern used to resolve the similar issue #393, where the entire discordProfile was made optional and nullable.

Implementation

• Added patch-package as a dev dependency in the epicshop package
• Created a patch file that modifies the validation schema in @epic-web/workshop-utils
• Added a postinstall script to automatically apply patches on fresh installs
• Tested the fix with both problematic and normal Discord profile data

The workshop now starts successfully regardless of Discord profile completion status, while maintaining all existing functionality for users with complete Discord profiles.

Fixes #423.

Warning

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