perf(chain-db): speed up chain sync batching and rollback handling

[AndrewWestberg]

Batch chain and ledger writes, cache per-block metadata lookups, and cap catch-up buffer growth to improve initial sync performance. Update gradle/kogmios versions and record perf PRD tasks.

[Copilot]

Pull request overview

Improve initial chain sync throughput by batching DB writes, reducing per-block query overhead, and preventing unbounded catch-up buffering while keeping rollback semantics correct.

Changes:

• Cap sync batch growth during catch-up via configurable maxCatchupBlockBufferSize.
• Gate rollback work to RollBackward events and add per-block metadata lookup caching.
• Batch chain inserts / UTXO creation + spending updates; bump Gradle and Kogmios versions; add perf PRD/task docs.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
newm-chain/src/main/kotlin/io/newm/chain/daemon/MonitorAddressDaemon.kt	Adds config-driven cap for catch-up buffer growth.
newm-chain/src/main/kotlin/io/newm/chain/daemon/BlockDaemon.kt	Adds rollback gating, buffer-cap logic, and per-block metadata caching.
newm-chain-db/src/main/kotlin/io/newm/chain/database/repository/LedgerRepositoryImpl.kt	Reworks spent/created UTXO writes into batch SQL/batchInsert to reduce N+1 and update overhead.
newm-chain-db/src/main/kotlin/io/newm/chain/database/repository/ChainRepositoryImpl.kt	Switches chain writes to batchInsert and computes etaV in-memory per batch.
gradle/wrapper/gradle-wrapper.properties	Updates Gradle wrapper version.
buildSrc/src/main/kotlin/Versions.kt	Updates Kogmios version constant.
.opencode	Adds agent config entry.
.agent/task/newm-chain-db-improvement/newm-chain-db-performance-tasks.json	Adds tracked performance tasks list.
.agent/task/newm-chain-db-improvement/newm-chain-db-performance-prd.md	Adds PRD describing performance plan and completion status.
.agent/skills/git-commit-formatter/SKILL.md	Adds skill doc for conventional commit formatting.

[AndrewWestberg]

Dropping the prompt here for future dev's reference. I looped on this until the PRD was complete clearing the context window before each loop.

Implement the next highest priority task from @.agent/task/newm-chain-db-improvement/newm-chain-db-performance-tasks.json with additional context from @.agent/task/newm-chain-db-improvement/newm-chain-db-performance-prd.md . Plan your task carefully and ensure each update is precise and does not cause data integrity issues. Update any relevant tests if necessary. Execute the workflow @.agent/workflows/test.md . Once complete, update your status in the PRD and json tasks file. Then prompt the user for whether they want to make a git commit or not. If yes, use the git-commit-formatter skill and use your best judgment for wording the commit message automatically.