Expand Dependabot coverage across Rust crates and frontend apps, run daily

[loid345]

Motivation

• Ensure all Rust crates, the MCP/server/admin modules, and frontend Leptos apps receive frequent dependency updates so libraries remain current.
• Allow Dependabot to propose major updates in grouped PRs and run checks daily to reduce drift across the monorepo.

Description

• Updated .github/dependabot.yml to change update intervals from weekly to daily and replaced the previous minor-updates groups with all-updates that allow major, minor, and patch update-types.
• Added per-package entries for relevant Cargo directories (for example apps/admin, apps/server, apps/storefront, apps/mcp, and many crates/* folders) and switched the npm app entries (/apps/next-frontend, /apps/next-admin, /apps/storefront, /apps/admin) to daily all-updates.
• Updated .github/workflows/dependencies.yml to grant the workflow security-events: write permission to support security-related automation.
• Changes were committed with the message Expand Dependabot coverage.

Testing

• No automated tests were run because this is a CI/configuration-only change.
• The updated dependabot.yml and workflow files were inspected in-repo to verify the new entries and permissions were added successfully.

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Codex Task