Setup for CS 61A observations/interviews

[phrdang]

• Add cs61a_config.json for retrieving OkPy backups using CLI
• Remove uniqueness constraint on lint errors (not really sure why the unique constraint is failing but OkPy is like that I guess...) in backups CLI and Rails app LintError model
• Remove uniqueness (primary key) constraint on UnlockMessageCase Rails model (also not really sure why this doesn't work)
• Remove unused query command in backups CLI
• In BackupFileMetadataController and BackupsController, include backups with file contents or if they were grading or unlock protocols
• Update seeds.rb to use faker gem to make fake user data
• Add openssl gem at 3.3.1 to handle AWS S3 cert issue
• Update brakeman.ignore
• Add back autogenerated primary key id to LintError model so that the test fixtures work properly
• Update test fixtures so unit tests work again based on new behavior and schemas: analytics_messages.yml, backup_metadata.yml, backup_file_metadata.yml