deps: adopt spanvalue v0.9.0 FLOAT32 negative-zero literals

[apstndb]

Adopt released spanvalue v0.9.0 and remove the local FLOAT32 negative-zero formatting workaround. SQL export, typed replay and cyclic DUMP now use the library's literal preset directly; cyclic DUMP retains its additional wire-validation checks.

The upstream fix in apstndb/spanvalue#268 emits CAST(-0.0 AS FLOAT32) so replay preserves the sign. Its scalar/array/struct and SQL INSERT matrices are covered by TestLiteralFloat32NegativeZero and TestSQLInsertWriterFloat32NegativeZero upstream. The application keeps independent expected literals for formatter selection, all SQL INSERT modes, matching string/JSON text, and empty/NULL arrays. Malformed FLOAT32 checks require the error cause and payload, and real buffered/streamed DUMP replay still checks sign bits.

Validation: Go 1.26.8 make check with golangci-lint 2.13.2, make check-race, focused SQL-literal/DUMP replay tests, and all required CI checks. The dependency's Go 1.25 minimum is below the application's existing Go 1.26.8 requirement.

Physical line changes: production -21, tests -18, fixtures unchanged. No replace directive or unrelated dependency upgrades.

[github-actions]

Code Metrics Report

📊 View detailed coverage report (available for 7 days)

	main (1b8003f)	#1018 (93db072)	+/-
Coverage	87.2%	87.2%	-0.1%
Code to Test Ratio	1:2.5	1:2.5	+0.0
Test Execution Time	2m39s	3m4s	+25s

Details

  |                     | main (1b8003f) | #1018 (93db072) |  +/-  |
  |---------------------|----------------|-----------------|-------|
- | Coverage            |          87.2% |           87.2% | -0.1% |
  |   Files             |            132 |             132 |     0 |
  |   Lines             |          13284 |           13277 |    -7 |
- |   Covered           |          11588 |           11580 |    -8 |
+ | Code to Test Ratio  |          1:2.5 |           1:2.5 |  +0.0 |
  |   Code              |          28876 |           28861 |   -15 |
- |   Test              |          73544 |           73521 |   -23 |
- | Test Execution Time |          2m39s |            3m4s |  +25s |

Code coverage of files in pull request scope (92.5% → 92.2%, patch 100.0%)

Files	Coverage	+/-	Patch Coverage	Status
internal/mycli/dump_cyclic_mutations.go	91.3%	0.0%	100.0%	modified
internal/mycli/execute_partitioned.go	90.7%	-0.9%	-	affected
internal/mycli/execute_sql.go	94.0%	-0.2%	100.0%	modified
internal/mycli/typed_rows.go	89.6%	0.0%	100.0%	modified

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Reported by octocov

[apstndb]

Reviewed f0a66f5: no actionable findings. The direct preset calls preserve SQL export, typed replay and cyclic DUMP policy; upstream-owned literal cases and retained application integration assertions were checked. Independent make check, the worker's race/focused replay tests and all required CI checks passed. No unresolved review threads or pending reviews were present.