fix: cut down per request garbage

[ferhatelmas]

What kind of change does this PR introduce?

Refactor

What is the current behavior?

Every request creates a new tenant location but it's immutable.
Renderer creates a every version and then discards all except one.

What is the new behavior?

Create a singleton tenant location and shared with all requests.
Use switch in renderer so that it only creates what it needs, nothing else.

Additional context

This reduces per request garbage.

[Copilot]

Pull request overview

This PR reduces per-request garbage by reusing immutable objects and avoiding unnecessary renderer factory allocations in the Storage layer and HTTP storage plugin.

Changes:

• Refactored Storage.renderer() to use a switch for lazy, single-renderer instantiation instead of constructing an object of factories per call.
• Reused a singleton TenantLocation for non-iceberg requests to avoid per-request allocations.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/storage/storage.ts	Avoids per-call renderer factory object creation by switching to an exhaustive switch and assertNever.
src/http/plugins/storage.ts	Reuses a singleton TenantLocation instead of allocating a new one for every non-iceberg request.

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[coveralls]

Coverage Report for CI Build 28776554048

Coverage decreased (-0.002%) to 78.854%

Details

• Coverage decreased (-0.002%) from the base build.
• Patch coverage: 2 uncovered changes across 1 file (6 of 8 lines covered, 75.0%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
src/storage/storage.ts	7	5	71.43%
Total (2 files)	8	6	75.0%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	12241
Covered Lines:	10095
Line Coverage:	82.47%
Relevant Branches:	7039
Covered Branches:	5108
Branch Coverage:	72.57%
Branches in Coverage %:	Yes
Coverage Strength:	420.81 hits per line

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💛 - Coveralls