Here are some examples of each of your points:
• potential for unintended migration of substances from the packaging material into food or other hygiene-sensitive products - perhaps certain storage or food types (acidic/alkaline) causes chemicals to leach through the surface of the aluminum and come in contact with food.
• potential problems arising from the use of recycled materials - recycled materials containing some sort of chemicals causing issue with your product.
• foreseeable misuse by the consumer - customer using aluminum for unintended uses
• defects critical to consumer safety - potential for food safety hazards in aluminum (think foreign material or aluminum sharps)
• hazards that may have an impact on the functional integrity and performance of the final product in use - potential for hazards like aluminum not being sealed or thickness of aluminum not robust enough for final use, etc.
• potential for malicious intervention - employees intentionally sabotaging product
• potential for raw material fraud. - suppliers using unapproved filler or alternate materials and stating product is 100% aluminum