Clarify whether relationships can be configured between entities on different contexts

[dotcom9]

For example, if an application uses AspNet Identity, which has its own context, is it possible to create a foreign key to ApplicationUser from an entity managed by a different context?

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Document Details

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• ID: 24b2b50e-35f8-9e0b-8ce5-840e1ea816e6
• Version Independent ID: 9e0e6e2c-48fa-76c3-3bd9-813a6df22645
• Content: Relationships - EF Core
• Content Source: entity-framework/core/modeling/relationships.md
• Product: entity-framework
• Technology: entity-framework-core
• GitHub Login: @AndriySvyryd
• Microsoft Alias: avickers

[ajcvickers]

Related to bounded context documentation: #750