fix(runtime-core): cache synchronous shared factories

[2heal1]

Cache factories returned by synchronous shared getters in the registered share record so subsequent loadShareSync calls reuse the loaded factory.

The existing behavior dates back to the v1 implementation, where setShared returned immediately for an existing version. In the current runtime this leaves the share marked as loaded without a lib, causing later synchronous loads to invoke get again. The merge now fills lib only when the registered share does not already have one, preserving the existing provider and factory precedence.

A regression test verifies that the getter runs once and that the factory is stored in the share scope.

Validation:

• pnpm exec turbo run test --filter=@module-federation/runtime-core --force (12 test files, 97 tests passed)
• pnpm run ci:local --only=build-and-test (44 package builds and 60 affected test tasks passed)
• Changeset scope/status validation for @module-federation/runtime-core patch
• pnpm exec prettier --check . reports the unchanged baseline file packages/playground/src/generated/bridgeRuntimeFiles.ts; the CI changed-file format check passes for all files in this PR

[changeset-bot]

🦋 Changeset detected

Latest commit: fd3a32e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 48 packages

Name	Type
@module-federation/runtime-core	Patch
@module-federation/nextjs-mf	Patch
@module-federation/runtime	Patch
@module-federation/bridge-react	Patch
@module-federation/devtools	Patch
@module-federation/dts-plugin	Patch
@module-federation/esbuild	Patch
@module-federation/metro	Patch
@module-federation/modern-js-v3	Patch
@module-federation/modern-js	Patch
@module-federation/node	Patch
@module-federation/observability-plugin	Patch
@module-federation/playground	Patch
@module-federation/retry-plugin	Patch
@module-federation/runtime-tools	Patch
@module-federation/webpack-bundler-runtime	Patch
@module-federation/bridge-vue3	Patch
website-new	Patch
@module-federation/metro-plugin-rnc-cli	Patch
@module-federation/metro-plugin-rnef	Patch
@module-federation/metro-plugin-rock	Patch
shared-tree-shaking-with-server-host	Patch
shared-tree-shaking-with-server-provider	Patch
@module-federation/rsbuild-plugin	Patch
@module-federation/rstest	Patch
node-dynamic-remote-new-version	Patch
node-dynamic-remote	Patch
@module-federation/enhanced	Patch
@module-federation/rspack	Patch
@module-federation/inject-external-runtime-core-plugin	Patch
@module-federation/rspress-plugin	Patch
remote5	Patch
remote6	Patch
@module-federation/storybook-addon	Patch
shared-tree-shaking-no-server-host	Patch
shared-tree-shaking-no-server-provider	Patch
@module-federation/sdk	Patch
@module-federation/managers	Patch
@module-federation/manifest	Patch
@module-federation/third-party-dts-extractor	Patch
@module-federation/bridge-shared	Patch
@module-federation/bridge-react-webpack-plugin	Patch
@module-federation/error-codes	Patch
create-module-federation	Patch
@module-federation/cli	Patch
@module-federation/treeshake-server	Patch
@module-federation/treeshake-frontend	Patch
@module-federation/utilities	Patch

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[pkg-pr-new]

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@module-federation/devtools

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@module-federation/enhanced

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@module-federation/esbuild

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@module-federation/managers

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@module-federation/manifest

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@module-federation/metro

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@module-federation/metro-plugin-rnc-cli

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@module-federation/metro-plugin-rnef

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@module-federation/metro-plugin-rock

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@module-federation/modern-js

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@module-federation/modern-js-v3

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@module-federation/native-federation-tests

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@module-federation/observability-plugin

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@module-federation/playground

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@module-federation/runtime

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@module-federation/runtime-core

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@module-federation/runtime-tools

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@module-federation/sdk

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@module-federation/storybook-addon

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@module-federation/bridge-react-webpack-plugin

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@module-federation/bridge-shared

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@module-federation/bridge-vue3

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commit: fd3a32e

[github-actions]

Bundle Size Report

11 package(s) changed, 32 unchanged.

Package dist + ESM entry

Package	Total dist (raw)	Delta	ESM gzip	Delta
@module-federation/bridge-vue3	182.3 kB	+29 B (+0.0%)	26.4 kB	+6 B (+0.0%)
@module-federation/inject-external-runtime-core-plugin	5.2 kB	-26 B (-0.5%)	519 B	no change
@module-federation/playground	28.88 MB	-561 B (-0.0%)	45.2 kB	no change
@module-federation/runtime-core	299.5 kB	+72 B (+0.0%)	570 B	no change
@module-federation/runtime-tools	7.8 kB	+65 B (+0.8%)	142 B	no change

Bundle targets

Package	Web bundle (gzip)	Delta	Node bundle (gzip)	Delta
@module-federation/bridge-vue3	19.5 kB	+5 B (+0.0%)	19.7 kB	+6 B (+0.0%)
@module-federation/cli	2.3 kB	-1 B (-0.0%)	2.4 kB	-31 B (-1.3%)
@module-federation/core	1.0 kB	-2 B (-0.2%)	1.0 kB	-33 B (-3.0%)
@module-federation/devtools	30.3 kB	-2 B (-0.0%)	30.3 kB	-25 B (-0.1%)
@module-federation/enhanced	2.7 kB	no change	2.8 kB	-42 B (-1.5%)
@module-federation/metro-plugin-rnc-cli	416 B	no change	435 B	-25 B (-5.4%)
@module-federation/node	9.1 kB	+1 B (+0.0%)	9.2 kB	-28 B (-0.3%)
@module-federation/runtime-core	15.6 kB	+5 B (+0.0%)	15.3 kB	+5 B (+0.0%)

Consumer scenarios

Scenario	Web output (gzip)	Delta	Node output (gzip)	Delta	Gap (node-web)	Delta
Enhanced remoteEntry	21.7 kB	-13 B (-0.1%)	23.3 kB	-9 B (-0.0%)	+1.6 kB	+4 B

Total dist (raw): 35.90 MB (-421 B (-0.0%))
Total ESM gzip: 109.9 kB (+6 B (+0.0%))
Total web bundle (gzip): 239.0 kB (+6 B (+0.0%))
Total node bundle (gzip): 241.2 kB (-173 B (-0.1%))
Tracked ./bundler entry gzip: 556 B (no change)
Tracked ./bundler web bundle (gzip): 4.8 kB (no change)
Tracked ./bundler node bundle (gzip): 4.8 kB (no change)

Bundle sizes are generated with rslib (Rspack). Package-root metrics preserve the historical report. Tracked subpath exports such as ./bundler are measured separately so ENV_TARGET-driven tree-shaking is visible. Bare imports are externalized to keep package-level sizes consistent, and assets are emitted as resources.