add deprecation-only callouts to quickstarts and tutorials using AccountBalanceQuery

[theekrystallee]

description

~82 references to AccountBalanceQuery across 7 tutorial files, plus one each in the java and go quickstarts, use it as a supporting step. none carried a deprecation warning.

code is not swapped here (that is #724) — swapping only js while java/go tabs still show the old query reads as inconsistent. this issue adds deprecation callouts now, decoupled from replacement availability.

files

• native/quickstart/java.mdx, native/quickstart/go.mdx — inline comment/link near the AccountBalanceQuery call
• native/tutorials/getting-started/auto-create-accounts.mdx
• native/tutorials/tokens/create-transfer-fungible.mdx
• native/tutorials/tokens/create-transfer-nft.mdx
• native/tutorials/tokens/airdrop-campaign.mdx
• native/tutorials/tokens/hts-part1-mint.mdx
• native/tutorials/tokens/hts-part2-kyc.mdx
• native/tutorials/tokens/hts-part3-admin.mdx

what to do

• quickstarts: short inline comment, e.g. // AccountBalanceQuery is deprecated, see /native/accounts/get-balance.
• tutorials: one <Warning>/<Note> near the top of each file linking to /native/accounts/get-balance for the full timeline and migration paths.

acceptance criteria

• each listed quickstart has an inline deprecation comment/link
• each listed tutorial has one top-of-file deprecation callout
• no code samples changed (that is swap in MirrorNodeAccountBalanceQuery once Java/Go ship (and js where it makes sense sooner) #724)