chore(deps): bump dependencies to latest minor/patch across lambdas and frontend

[jeromevdl]

Bump versions

• All @aws-sdk/* clients to ^3.1060.0
• @smithy/config-resolver to ^4.5.6
• gremlin to ^3.8.1, gremlin-aws-sigv4 to ^3.6.1
• @modelcontextprotocol/sdk to ^1.29.0
• yjs to ^13.6.31, ws to ^8.21.0, lib0 to ^0.2.117
• Frontend: react/react-dom to ^19.2.7, react-router-dom to ^7.16.0, @types/react to ^19.2.16, postcss to ^8.5.15, vite to ^8.0.16

Skipped major bumps: @smithy/node-config-provider (3->4), aws-jwt-verify (4->5), y-websocket (2->3), zod (3->4), lucide-react (0.x->1.x), @types/node (24->25).

Supersedes

Closes the following dependabot PRs once merged:

• build(deps): bump react-router-dom from 7.15.1 to 7.16.0 in /frontend #211 — react-router-dom 7.16.0
• build(deps): bump yjs from 13.6.30 to 13.6.31 in /frontend #210 — yjs 13.6.31
• build(deps): bump @aws-sdk/client-dynamodb from 3.1060.0 to 3.1063.0 in /lambda/submit-question #164 — @aws-sdk/client-dynamodb (submit-question)
• build(deps): bump @aws-sdk/client-ssm from 3.1060.0 to 3.1063.0 in /lambda/agents-ecs #156 — @aws-sdk/client-ssm (agents-ecs)
• build(deps): bump @aws-sdk/client-dynamodb from 3.1060.0 to 3.1063.0 in /lambda/agents-ecs #155 — @aws-sdk/client-dynamodb (agents-ecs)
• build(deps): bump @aws-sdk/client-dynamodb from 3.1060.0 to 3.1076.0 in /lambda/agents #148 — @aws-sdk/client-dynamodb (agents)

Major-version dependabot PRs (#209, #208, #166, #158, #154, #108) remain open for separate review.

All 384 backend tests pass. Frontend typecheck and build succeed. Frontend tested and works properly.

Note: if you need to update the package-lock.json, use npm --prefix lambda/agents install --package-lock-only to avoid producing the node_modules folder which makes the terraform build longer (duplicate files in node_modules)

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