Align DPoS doc with consensus source code

[abn2357]

Summary

• Clarify deterministic tiebreak by address in the Block Production Order ("出块顺序") definition when two SRs have the same vote count.
• Rewrite the Epoch ("出块轮") and Maintenance Period ("维护期") rows so they describe what actually happens at an epoch boundary: vote tally, re-election of the 27 SRs, update of the next epoch's production order, and block production skipping exactly 2 slots (6 seconds).
• Note that the block / voting reward amounts listed are current mainnet values set by on-chain proposals, not protocol constants, and can still be adjusted via future proposals. Added an anchor on the "基于提案的参数调整" section so the note can link to it.

Test plan

• Render docs/mechanism-algorithm/dpos.md and verify the table, reward section, and anchor link display correctly.

Mirrors tronprotocol/documentation-en#595