refactor[array]: serialization context filter by ids (not whole registry)

[joseph-isaacs]

The serialization context only needs registry IDs for filtering, so it now snapshots those IDs instead of retaining the entire registry.

[codspeed-hq]

Merging this PR will not alter performance

✅ 1847 untouched benchmarks
⏩ 46 skipped benchmarks¹

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_{Comparing agent/context-valid-ids (fdc2ca3) with develop (037b1a8)}

Footnotes

1. 46 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. ↩

[github-actions]

Polar Signals Profiling Results

Latest Run

Status	Commit	Job	Attempt	Link
🟢 Done	fdc2ca3		1	Explore Profiling Data

Previous Runs (1)

Status	Commit	Job	Attempt	Link
🟢 Done	3138b60		1	Explore Profiling Data

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[github-actions]

Benchmarks: Vortex queries 📖

Verdict: No clear signal (low confidence)
Attributed Vortex impact: +0.8%
Engines: DataFusion No clear signal (+7.0%, low confidence) · DuckDB No clear signal (-5.0%, low confidence)
Vortex (geomean): 0.962x ➖
Parquet (geomean): 0.958x ➖
Shifts: Parquet (control) -4.2% · Median polish -3.6%

How to read Verdict and Engines

• Verdict: Overall PR-level signal after subtracting baseline drift estimated from Parquet control rows. It can be Likely improvement, Likely regression, or No clear signal.
• Engines: Per-engine attribution. DataFusion is compared against DataFusion/Parquet controls; DuckDB is compared against DuckDB/Parquet controls. This answers whether each engine improved or regressed independently.
• Confidence: Based on directional consistency, share of rows above the noise floor, and control-run noise.

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datafusion / vortex-file-compressed (0.993x ➖, 0↑ 0↓)

name	PR fdc2ca3 (ns)	base c0d1a4e (ns)	ratio (PR/base)
vortex_q00/datafusion:vortex-file-compressed	9849458	9821687	1.00
vortex_q01/datafusion:vortex-file-compressed	6129375	6238822	0.98

datafusion / parquet (0.927x ➖, 0↑ 0↓)

name	PR fdc2ca3 (ns)	base c0d1a4e (ns)	ratio (PR/base)
vortex_q00/datafusion:parquet	20225869	21655580	0.93
vortex_q01/datafusion:parquet	4485219	4870956	0.92

duckdb / vortex-file-compressed (0.940x ➖, 0↑ 0↓)

name	PR fdc2ca3 (ns)	base c0d1a4e (ns)	ratio (PR/base)
vortex_q00/duckdb:vortex-file-compressed	9869567	10494664	0.94
vortex_q01/duckdb:vortex-file-compressed	5964474	6351326	0.94

duckdb / parquet (0.989x ➖, 0↑ 0↓)

name	PR fdc2ca3 (ns)	base c0d1a4e (ns)	ratio (PR/base)
vortex_q00/duckdb:parquet	23322040	23499817	0.99
vortex_q01/duckdb:parquet	9426531	9559125	0.99

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No file size changes detected.