2.7.2rc6: Document updates and bug fixes

What's Changed

• [2.7] Add Server-Side Memory Management for Long-Running FL Jobs by @chesterxgchen in #4042
• [2.7] same switch to open model for llm by @ZiyueXu77 in #4044
• [2.7] Support bf16 in PT model persistor by @holgerroth in #4045
• [2.7] remove no longer supported arg, fix data format by @ZiyueXu77 in #4047
• [2.7] Add integration tests for examples (cherrypick from #4041) by @pcnudde in #4051
• [2.7] Move monai examples under advanced by @holgerroth in #4053
• [2.7] Update custom authentication example by @holgerroth in #4055
• Fixed keycloak docker tag by @pcnudde in #4058
• [2.7] increase link check timout by @holgerroth in #4060
• [2.7] Increase BioNeMo external script init timeout by @holgerroth in #4057
• [2.7] Update Edge for Android by @holgerroth in #4064
• [2.7] update GNN readme by @holgerroth in #4065
• [2.7] Update info logging of Cacheable by @holgerroth in #4062
• [2.7] Fix the rest of the examples by @nvkevlu in #4039
• [2.7] Updates to notebooks by @ZiyueXu77 in #4066
• [2.7] Add timeout check by @holgerroth in #4070
• [2.7] Update to standardize all cifar10 data location in self-paced tutorails by @ZiyueXu77 in #4072
• [2.7] Fix/notebooks by @pcnudde in #4068
• [2.7] fix skmeans and vertical learning notebooks by @pcnudde in #4076
• [2.7] Replace NLP-NER with link to tutorial by @holgerroth in #4077
• [2.7] Add missing server_memory_gc_rounds parameter to recipes by @chesterxgchen in #4081
• [2.7] Redesign Job-level Authorization Example by @holgerroth in #4074
• [2.7] amplify tutorial updates by @ZiyueXu77 in #4089
• [2.7] Remove link check on github by @YuanTingHsieh in #4104
• [2.7] Logging tutorial fix by @holgerroth in #4098
• [2.7] Job CLI Tutorial Fixes by @holgerroth in #4096
• [2.7] Add dynamic ignore_result_error logic and POC environment cleanup by @chesterxgchen in #4084
• [2.7] Update docker example by @ZiyueXu77 in #4102
• [2.7] Chapter 1 TensorBoard Streaming Fix by @holgerroth in #4103
• [2.7] Update holoscan tutorial by @ZiyueXu77 in #4095
• [2.7] Improve df_stat example by @ZiyueXu77 in #4108
• [2.7] Chapter 8 Fixes by @holgerroth in #4105
• [2.7]: Fix finance example by @IsaacYangSLA in #4091
• [2.7] Add model config interface with dict-based model input and initial_ckpt support part 1 of 3 by @chesterxgchen in #4082
• [2.7]: Update the streaming example with more details by @IsaacYangSLA in #4114
• [2.7] Fix xgboost recipes by @nvkevlu in #4087
• [2.7] Fix federated_policy example by @IsaacYangSLA in #4090
• [2.7] Remove multi gpu tf 2.7 by @nvkevlu in #4116
• [2.7] Add dict config and initial_ckpt support to standard recipes (Part 2) by @chesterxgchen in #4117
• [2.7] Address potential data corruption issue with Streamer by @YuanTingHsieh in #4100

Full Changelog: 2.7.2rc5...2.7.2rc6