Dgraph v20.11.0-rc5

6b953b5 fix(GraphQL): fix internal Aliases name generation (#7009) (#7132)
098480f fix(raftwal): unmarshal snapshot onto zerosnapshot instead of membershipState (#7125) (#7128)
8b8b0ad Fix(GraphQL): Fix Aggregate queries on empty data
61ff62f fix(GraphQL): Correctly apply order for root auth query (GRAPHQL-854) (#7117)
e2d93de perf(GraphQL): Part-4: Child auth queries are derived from auth filtered parents (GRAPHQL-854) (#7111)
004ca03 Fix(bulk): Correctly append all the slices of cbuf while reduce phase (#7110)
2894f6b chore(GC): Increase discard ratio from 0.7 to 0.9 (#7114)
2e5499f [BREAKING] Fix(OOM): Don’t unmarshal pb.Proposals until we need them (#7059)
7f12eee Fix(GraphQL): Add support for repeatitive fields in aggregate query (#7094)
67abf95 perf(GraphQL): Part-3: Filter child auth queries as early as possible (GRAPHQL-854) (#7107)
9baa3c7 perf(GraphQL): Part-2: Remove unnecessary dgraph.uid : uid selections for auth queries (GRAPHQL-854) (#7105)
c03c327 fix(GraphQL): don’t update cacheMb if not specified by user (GRAPHQL-888) (#7103)
5042370 perf(GraphQL): Part-1: Pagination for root user query is applied at root auth query (GRAPHQL-854) (#7100)
843fe1f feat(tablet): add uncompressed size to pb.Tablet (#7095)
5efdfbf Fix(Zero): Fix how Zero snapshots and purge works (#7096)
73b36d4 [docs] added backup policy (#7084)