fix: allow string type for tables.id parameter with safe conversion

[ZdenekSrotyr]

Summary

Fixes configuration validation error where parameters.tables[].id was strictly typed as integerNode, causing failures when the UI/API sends the value as a string (e.g., "0" instead of 0).

The id field now uses scalarNode with custom validation that:

• Accepts integer values directly
• Converts numeric strings to integers (e.g., "123" → 123)
• Throws a clear error for non-numeric values

This is consistent with how sheetId is already handled in the same configuration file.

Triggered by: Datadog alert for keboola.wr-google-sheets showing Invalid type for path "parameters.tables.0.id". Expected int, but got string.

CI Status

• ✅ build: Passes (lint, phpcs, phpstan)
• ✅ tests-in-kbc: Passes
• ⚠️ tests: Fails due to expired Google OAuth credentials (unrelated to this change - 401 Unauthorized on token refresh)

Review & Testing Checklist for Human

• IMPORTANT: The min(0) constraint was removed. Verify if negative IDs should be rejected (integer -1 would now be accepted; string "-1" is rejected by ctype_digit)
• Verify edge cases: empty string "", float string "1.5", negative string "-1" - all should throw errors
• Test with the actual failing configuration from project 16370 to confirm the fix resolves the issue
• Consider refreshing Google OAuth credentials in CI secrets to fix the unrelated test failure

Recommended Test Plan

1. Deploy to a test environment using the branch tag
2. Run a configuration with "id": "0" (string) - should now work
3. Run a configuration with "id": 0 (integer) - should still work
4. Run a configuration with "id": "abc" - should fail with clear error

Notes

• The ctype_digit() function only returns true for strings containing digits 0-9, so negative numbers as strings will be rejected
• Link to Devin run: https://app.devin.ai/sessions/380b7b3ec35f48079446d4d2f53f8992
• Requested by: zdenek.srotyr@keboola.com (@ZdenekSrotyr)

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