Update changelog

Author: AHaliq

CHANGELOG.md

@@ -120,6 +120,64 @@
   - `common_update_keys` is removed, and instead `keys.level_2_keys` should be used, which can be used to construct an `UpdateSigner`, or converted to `types::AuthorizationsV0`.
 - BREAKING: The parameter of `PendingUpdateEffect::AddAnonymityRevoker` is now `Box`ed.
 
+- Introduce `serde_deprecated` flag
+  - guarded by flag
+   - `internal::timestamp_millis`
+    - `internal::account_amounts`
+    - `internal::duration_millis`
+    - `types::smart_contracts::contract_trace_Via_events`
+    - `types::summary_helper`
+  - serde relevant `derive`s and `impl`s guarded by flag
+    - `protocol_level_tokens::AccountToken`
+    - `protocol_level_tokens::TokenAccountState`
+    - `types::AccountEncryptedAmount`
+    - `types::AccountReleaseSchedule`
+    - `types::Release`
+    - `types::BakerInfo`
+    - `types::BakerPoolInfo`
+    - `types::AccountStakingInfo`
+    - `types::Cooldown`
+    - `types::AccountInfo`
+    - `types::BirkParameters`
+    - `types::BirkBaker`
+    - `types::StakePendingChange`
+    - `types::RewardsOverview`
+    - `types::CommonRewardData`
+    - `types::reward_overview::RewardsDataRaw`
+    - `types::PoolPendingChange`
+    - `types::CurrentPaydayBakerPoolStatus`
+    - `types::lottery_power_parser`
+    - `types::BakerPoolStatus`
+    - `types::ActiveBakerPoolStatus`
+    - `types::PassiveDelegationStatus`
+    - `types::PoolStatus`
+    - `types::TransactionStatusInBlock`
+    - `types::TransactionStatus`
+    - `types::SpecialTransactionOutcome`
+    - `types::BlockSummaryData`
+    - `types::FinalizationSummary`
+    - `types::FinalizationSummaryParty`
+    - `types::BlockItemSummary`
+    - `types::NewEncryptedAmountEvent`
+    - `types::EncryptedAmountRemovedEvent`
+    - `types::BakerAddedEvent`
+    - `types::BakerKeysEvent`
+    - `types::EncryptedSelfAmountAddedEvent`
+    - `types::ContractInitializedEvent`
+    - `types::RejectReason`
+    - `types::queries::BlockInfo`
+    - `types::queries::ConsensusInfo`
+    - `types::queries::ConcordiumBFTDetails`
+    - `types::queries::Branch`
+    - `types::queries::AccountNonceResponse`
+    - `types::queries::PendingUpdate`
+    - `types::queries::PendingUpdateEffect`
+    - `types::smart_contracts::InstanceInfo`
+    - `types::smart_contracts::instance_parser::InstanceInfoHelper`
+    - `types::smart_contracts::ContractContext`
+    - `types::smart_contracts::InvokeContractResult`
+  - `examples::update-validator-score-param::main` test to print results when flag disabled; without serde
+
 ## 7.0.0
 
 Adds support for integrating with Concordium nodes running protocol version 9.