Refresh documentation and highlight automatic SQLite schema reconstruction

[jogibear9988]

The README, homepage and comparison still presented implemented capabilities as V13 source-preview additions and included stale runner behavior. This update presents them as normal features and checks the descriptions against current master.

• Highlight automatic SQLite reconstruction from the live schema in the README, homepage and comparison tables. Distinguish it from FluentMigrator's manual alterations, DbUp/Evolve scripts and EF Core's model-based rebuilds, with source links and preservation limits.
• Document consolidated history, column collations, GUID defaults, foreign-key match restrictions, time/interval values and data-type boundaries. Correct dry-run semantics, removed SQL Server uniqueness ownership APIs and implemented SQL Server GO handling.
• Update comparison source pins and links, replace historical test-count prose with current CI evidence links, and keep compatibility/version details in the migration guide.

Validation: both exact README/homepage quick-start variants compiled and ran against SQLite, including re-running and rollback; the compiled fluent preview/migration/reversal example passed; all 5 homepage-renderer tests passed; checked HTML IDs, ARIA/copy/anchor targets and 85 repository file links; visually inspected the homepage SQLite section and comparison; whitespace check passed with existing CRLF endings recognized. No runtime code changed.

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