ci: add focused PR benchmark labels

[connortsui20]

Adds four mutually exclusive PR benchmark triggers:

• action/bench-ra
• action/bench-compress
• action/bench-sql (no Vortex Compact)
• action/bench-sql-compact (only Vortex Compact)

TODO after merge: delete the legacy action/benchmark* labels, which remain temporarily for the current develop dispatcher.

[connortsui20]

note that we probably dont want all of these labels, but I feel like a bit more than what we have on develop now would be nice?

[connortsui20]

actually Im going to make them all disjoint, lets see how that works

[codspeed-hq]

Merging this PR will improve performance by 16.73%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 1 improved benchmark
✅ 1891 untouched benchmarks
⏩ 3 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	cuda/bitpacked_u8/unpack/3bw[100M]	351.5 µs	301.1 µs	+16.73%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing ct/benchmark-labels (c5173aa) with develop (b15394a)}

Footnotes

1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[myrrc]

Let's use bench-random-access, ra isn't straight obvious