Add v3.1.0 resource and prompt support

[a6b8]

Changes

• Replace sql.js with better-sqlite3 (PRD-11)
• Add ResourceMarkdownLoader with parameter-based access (PRD-12)
• Add PromptLoader/PromptValidator for contentFile architecture (PRD-13)
• Rewrite ResourceDatabaseManager with origin system and mode support
• Rewrite ResourceExecutor with freeQuery auto-injection
• Update ResourceValidator for markdown resources
• Update Pipeline for prompt loading

Tests

• 551 tests pass (82+ new tests added)

Source

PRD-11, PRD-12, PRD-13 from flowmcp-resources-and-prompts-evolution-v0.3.md