refactor: sinks to use shared event enums and fix arcade SQLite startup

[MartianGreed]

No description provided.

[github-actions]

📊 Synthetic Benchmark Results

Comparing against baseline: 20260415T122419Z

Performance Summary

Token Type	Duration (ms)	Blocks	Transactions	Events	Envelopes	Blocks/sec	Events/sec
erc20	2906	100	50000	50000	50000	34.40	17202.34
erc1155	11066	100	50000	50000	70000	9.04	4517.97
erc721	12677	100	50000	50000	50000	7.89	3944.13

Comparison with Baseline

Token Type	Metric	Baseline	Current	Change
erc20	Throughput (events/sec)	17202.34	17202.34	➡️ 0.0%
erc20	Duration (ms)	2906	2906	➡️ 0.0%
erc1155	Throughput (events/sec)	4517.97	4517.97	➡️ 0.0%
erc1155	Duration (ms)	11066	11066	➡️ 0.0%
erc721	Throughput (events/sec)	3944.13	3944.13	➡️ 0.0%
erc721	Duration (ms)	12677	12677	➡️ 0.0%

Legend:

• ✅ Improvement (faster)
• ⚠️ Regression (slower)
• 📈 Throughput increase
• 📉 Throughput decrease
• ➡️ No significant change (<5%)

Stage Latency Breakdown

Token Type	Extract (ms)	Decode (ms)	Sink (ms)	Commit (ms)
erc20	14.108328	51.32821600000001	2774.2972779999996	0.032431999999999996
erc1155	39.51049899999999	74.17739800000003	10884.936749000004	0.029369000000000006
erc721	12.713398000000005	397.14161499999994	12201.105292000004	0.046110999999999985

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