Revert "perf(gas_solana_tx_fees): merge compute_limit + compute_unit_price into single compute_budget table"

[0xRobin]

Reverts #9880

[linear-code]

Issue reopened: CUR2-2801 perf(gas_solana_tx_fees_current): restructure dual compute_limit/compute_unit_price joins (~6.1 CPU-hrs/day)

[cursor]

PR Summary

Medium Risk
Touches fee/prioritization math inputs and doubles instruction_calls scans versus the merged model, but logic matches the prior reverted design with no auth or data-mutation risk.

Overview
Reverts the merged gas_solana_compute_budget approach and restores the pre-#9880 Solana gas fee pipeline.

gas_solana_compute_limit and gas_solana_compute_unit_price are again incremental Delta tables that decode ComputeBudget opcodes 0x02 and 0x03 directly from solana.instruction_calls, instead of thin views over a shared budget table. The combined gas_solana_compute_budget model and its schema/tests are removed.

solana_tx_fees_macro joins those two models separately again (with per-join date predicates) rather than a single compute_budget ref. CI-only 3-day date bounds on transactions, block leaders, prices, and compute budget scans are also dropped from the macro.

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