Fix KeyError when metadata.container is missing in People parser

[SS-4]

Problem

GHunt crashes with:
KeyError: 'container'

This happens because Google responses sometimes omit "metadata.container".

Fix

Replaced unsafe dictionary access:
data["metadata"]["container"]

with safe access:
data.get("metadata", {}).get("container")

Result

• Prevents crashes
• Handles inconsistent API responses
• Keeps parsing functional

Tested locally — resolves crash across multiple emails.

[SS-4]

Note: I replaced multiple unsafe accesses in one pass because the same issue occurs in several places (emails, names, photos, etc.).

Happy to reduce this to minimal changes if preferred.