feat: Statistics and information about instance

[Brayden]

Purpose

The intent behind this pull request is to expose information about the deployed instance and expose it via a new route /_internal/stats when the ADMIN_AUTHORIZATION_TOKEN is passed in as the Authorization header. Primary driver for this is more of an internal business use case to populate a dashboard with metadata information for users to have quick insights to what is currently happening (reference image below).

Tasks

• Show database size (in bytes)
• Show recent queries count (dependent on QueryLogPlugin)
• Show active persistent WebSocket connections in DO
• Show names of installed plugins

Verify

curl --location --request GET 'https://starbasedb.{YOUR-IDENTIFIER}.dev/_internal/stats' \
--header 'Authorization: Bearer ABC123' \

Before

N/A

After

{
    "databaseSize": 65536,
    "activeConnections": 0,
    "recentQueries": 4,
    "plugins": [
        "starbasedb:websocket",
        "starbasedb:studio",
        "starbasedb:sql-macros",
        "starbasedb:query-log",
        "starbasedb:change-data-capture",
        "starbasedb:stats"
    ]
}

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔴	Lines	2.07% (🎯 75%)	21 / 1010
🔴	Statements	1.98% (🎯 75%)	21 / 1057
🔴	Functions	2.99% (🎯 75%)	5 / 167
🔴	Branches	0% (🎯 75%)	0 / 594

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/do.ts	0%	0%	0%	0%	18-244
src/index.ts	0%	0%	0%	0%	16-286
src/plugin.ts	0%	0%	0%	0%	6-114

Generated in workflow #50 for commit 87e4db3 by the Vitest Coverage Report Action