Add active ACL inspection functions

[glasstiger]

Summary

Register the new QuestDB Enterprise ACL inspection functions as table-valued functions:

• active_permissions() returns effective permissions across persisted users, groups, and service accounts, including group inheritance.
• active_grants() returns direct grants across those entities.

Both functions are added to the CURSOR section of tableValuedFunctions, in alphabetical order. This makes them available for autocomplete in table-source contexts such as SELECT * FROM active_permissions(), while keeping them out of scalar-expression suggestions.

Autocomplete regression tests cover both the positive FROM context and the negative SELECT expression context.

Dependencies

• Product implementation: questdb/questdb-enterprise#1222
• Documentation: questdb/documentation#566

Verification

• corepack yarn test: 15,105 tests passed, 1 skipped
• corepack yarn vitest run tests/autocomplete.test.ts -t "active": 2 tests passed
• corepack yarn typecheck
• corepack yarn lint