chore: bump ruby to 3.4.9 for metro example apps

[jbroma]

Description

Bump Ruby version from 2.6.10/2.7.6 to 3.4.9 across all metro example apps and CI.

• Pin Ruby 3.4.9 in Gemfiles and .ruby-version files
• Add gem 'nkf' for Ruby 3.4 stdlib compatibility (kconv removed)
• Update RUBY_VERSION in e2e-metro.yml CI workflow
• Regenerate Gemfile.lock and Podfile.lock

Related Issue

N/A — routine dependency bump.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated the documentation.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 2d86f8a

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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commit: 2d86f8a

[github-actions]

Bundle Size Report

10 package(s) changed, 30 unchanged.

Package dist + ESM entry

Package	Total dist (raw)	Delta	ESM gzip	Delta
@module-federation/cli	26.3 kB	no change	786 B	no change
@module-federation/core	39.1 kB	no change	173 B	no change
@module-federation/devtools	481.4 kB	no change	3.9 kB	no change
@module-federation/enhanced	813.5 kB	no change	672 B	no change
@module-federation/managers	69.8 kB	no change	334 B	no change
@module-federation/manifest	138.0 kB	no change	182 B	no change
@module-federation/metro-plugin-rnc-cli	0 B	no change	314 B	no change
@module-federation/node	189.1 kB	no change	217 B	no change
@module-federation/storybook-addon	77.5 kB	no change	100 B	no change
@module-federation/utilities	110.6 kB	no change	328 B	no change

Bundle targets

Package	Web bundle (gzip)	Delta	Node bundle (gzip)	Delta
@module-federation/cli	2.3 kB	-29 B (-1.2%)	2.3 kB	-29 B (-1.2%)
@module-federation/core	1.1 kB	-28 B (-2.5%)	1.0 kB	-27 B (-2.5%)
@module-federation/devtools	21.3 kB	-23 B (-0.1%)	21.3 kB	-23 B (-0.1%)
@module-federation/enhanced	2.6 kB	-39 B (-1.4%)	2.6 kB	-39 B (-1.4%)
@module-federation/managers	2.4 kB	-23 B (-0.9%)	2.4 kB	-23 B (-0.9%)
@module-federation/manifest	6.2 kB	-32 B (-0.5%)	6.2 kB	-32 B (-0.5%)
@module-federation/metro-plugin-rnc-cli	411 B	-23 B (-5.3%)	411 B	-23 B (-5.3%)
@module-federation/node	9.2 kB	-25 B (-0.3%)	9.2 kB	-25 B (-0.3%)
@module-federation/storybook-addon	1.9 kB	-21 B (-1.1%)	1.7 kB	-21 B (-1.2%)
@module-federation/utilities	2.6 kB	-28 B (-1.1%)	2.6 kB	-28 B (-1.1%)

Consumer scenarios

Scenario	Web output (gzip)	Delta	Node output (gzip)	Delta	Gap (node-web)	Delta
Enhanced remoteEntry	19.8 kB	-14 B (-0.1%)	20.8 kB	-14 B (-0.1%)	+1.0 kB	0 B

Total dist (raw): 6.31 MB (no change)
Total ESM gzip: 73.9 kB (no change)
Total web bundle (gzip): 179.4 kB (-271 B (-0.1%))
Total node bundle (gzip): 179.9 kB (-270 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.

[jbroma]

no changeset since only apps/ are affected

cc @2heal1 can you review and merge this please?