feat(analytics): Add refund sessionized metrics for Analytics V2 dashboard

[tsdk02]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

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Changed Files

File	Status
crates/analytics/src/refunds/core.rs	37% smaller
crates/analytics/src/clickhouse.rs	28% smaller
crates/analytics/src/refunds/accumulator.rs	11% smaller
crates/analytics/src/payments/distribution/payment_error_message.rs	5% smaller
crates/analytics/src/query.rs	2% smaller
crates/analytics/src/lib.rs	1% smaller
crates/analytics/src/payments/distribution.rs	0% smaller
crates/analytics/src/refunds.rs	0% smaller
crates/analytics/src/refunds/distribution.rs	0% smaller
crates/analytics/src/refunds/distribution/sessionized_distribution/mod.rs	0% smaller
crates/analytics/src/refunds/distribution/sessionized_distribution/refund_error_message.rs	0% smaller
crates/analytics/src/refunds/distribution/sessionized_distribution/refund_reason.rs	0% smaller
crates/analytics/src/refunds/filters.rs	0% smaller
crates/analytics/src/refunds/metrics.rs	0% smaller
crates/analytics/src/refunds/metrics/refund_count.rs	0% smaller
crates/analytics/src/refunds/metrics/refund_processed_amount.rs	0% smaller
crates/analytics/src/refunds/metrics/refund_success_count.rs	0% smaller
crates/analytics/src/refunds/metrics/refund_success_rate.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/mod.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/refund_count.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/refund_error_message.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/refund_processed_amount.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/refund_reason.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/refund_success_count.rs	0% smaller
crates/analytics/src/refunds/metrics/sessionized_metrics/refund_success_rate.rs	0% smaller
crates/analytics/src/refunds/types.rs	0% smaller
crates/analytics/src/sqlx.rs	0% smaller
crates/api_models/src/analytics.rs	0% smaller
crates/api_models/src/analytics/refunds.rs	0% smaller