NONEVM-3035: Initial LogPoller service metrics

[jadepark-dev]

This PR implements initial observability metrics for the TON LogPoller service, following the dual-write pattern established by TXM (Prometheus + OpenTelemetry/Beholder).

Primary Changes

Core Metrics Implementation (pkg/logpoller/metrics.go)

• Poll Duration: Gauge tracking duration of each poll iteration
• Poll Errors: Counter for poll iteration failures
• Blocks Behind: Gauge showing latest_block - last_processed_block
• Last Processed Block: Gauge with the last processed masterchain sequence number
• Blocks Processed: Counter for total blocks processed
• Logs Inserted: Counter for total logs inserted to database
• Loader Errors: Counter for transaction loading failures
• Parse Errors: Counter for log parsing failures

Database Query Metrics (Observed Stores)

• Query Duration: Gauge tracking database operation latency by query type
• Addresses Monitored: Gauge for number of addresses being monitored
• Query Result Size: Gauge for rows returned by queries

Observed Store Wrappers

• ObservedFilterStore: Wraps FilterStore with query duration and result metrics
• ObservedLogStore: Wraps LogStore with insertion and query metrics

Breaking Changes

• logpoller.NewService now returns (Service, error) to handle metric initialization errors

Others

• Cleaned up deprecated SendTonRequest function (callers migrated to SendCCIPMessage)
• Related Core PR:
  • chore: bumping chainlink-ton, ccip test helper clean up chainlink#20555

[jadepark-dev]

Now we use router binding directly https://github.com/smartcontractkit/chainlink/pull/20555/files#diff-45144f6908be8b664416f73badeb2c1af90789e7102bbc3759d9db3ff142e16cL214-R222

[Copilot]

Pull request overview

This PR implements observability metrics for the TON LogPoller service, following the dual-write pattern (Prometheus + OpenTelemetry) used by the TXM service. The metrics cover core polling operations, database queries, and error tracking to enable monitoring of LogPoller health and performance.

Key Changes:

• Added comprehensive metrics instrumentation to the LogPoller service including poll duration, blocks processed, logs inserted, and error counters
• Implemented observed store wrappers (ObservedFilterStore, ObservedLogStore) that add metrics to database operations
• Updated NewService to return (Service, error) for proper metric initialization error handling

Reviewed changes

Copilot reviewed 18 out of 22 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pkg/logpoller/metrics.go	Defines Prometheus and OpenTelemetry metrics for LogPoller operations, database queries, and error tracking
pkg/logpoller/service.go	Integrates metrics into the service, wraps stores with observed versions, updates signature to handle initialization errors
pkg/logpoller/observed_filter_store.go	Wrapper for FilterStore that records query duration and result metrics
pkg/logpoller/observed_log_store.go	Wrapper for LogStore that records insertion and query metrics
pkg/txm/metrics.go	Renames internal types and methods for consistency (tonTxmMetrics → txmMetrics, GetOtelAttributes → getOtelAttributes)
pkg/txm/txm.go	Updates to use renamed metrics types
pkg/relay/chain.go	Updates NewService call to handle error return value
integration-tests/smoke/logpoller/log_poller_test.go	Adds error handling for NewService calls
integration-tests/smoke/chainaccessor/accessor_test.go	Adds error handling for NewService calls
integration-tests/deployment/ccip/cs_test.go	Adds error handling for NewService calls
deployment/ccip/cs_test_helpers.go	Removes deprecated SendTonRequest and TonSendRequest in favor of SendCCIPMessage
go.mod, staging-monitor/go.mod, integration-tests/go.mod, deployment/go.mod	Adds chainlink-framework/metrics dependency and updates golang.org/x/* dependencies
go.md	Updates dependency graph to include chainlink-framework/metrics
scripts/.core_version	Updates core version reference
cmd/chainlink-ton/lock.nix	Updates Nix lock hash

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[ogtownsend]

lgtm