feat(db)!: expand live database access

[thorstenfoltz]

• 🗄️ Broaden live engine and warehouse support so users can browse, query, edit, and copy data from one interface.
• 🧭 Add catalog-aware CLI and MCP flows to make three-level database structures explicit and prevent accidental default-catalog writes.
• 🛑 Stop long-running queries at the source across supported vendors to reduce wasted work, billing, and blocked clients.
• 💥 Require catalog-aware write calls so unsupported engines reject unsafe catalog input instead of ignoring it.
• 🧱 Use vendor-specific DDL and safer type mappings to create and alter tables reliably across the expanded database matrix.
• ♻️ Reuse blank tabs for new files and split large modules to preserve behavior while improving maintainability.
• 📝 Refresh documentation, release notes, localization, tests, and safeguards for the expanded database and cancellation workflows.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ BASH	bash-exec	5		0	0	0.01s
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✅ JSON	prettier	4		0	0	0.39s
✅ JSON	v8r	4		0	0	2.99s
✅ MARKDOWN	markdownlint	132		0	0	3.56s
✅ MARKDOWN	markdown-table-formatter	132		0	0	2.12s
✅ REPOSITORY	validate-branch-name	yes		no	no	0.01s
✅ REPOSITORY	gitleaks	yes		no	no	8.25s
✅ REPOSITORY	ls-lint	yes		no	no	0.02s
✅ REPOSITORY	secretlint	yes		no	no	7.64s
✅ REPOSITORY	semgrep	yes		no	no	23.86s
✅ REPOSITORY	trivy	yes		no	no	3.66s
✅ SPELL	lychee	149		0	0	3.23s
✅ SPELL	proselint	133		0	0	88.23s
✅ YAML	prettier	12		0	0	1.01s
✅ YAML	v8r	11		0	0	5.55s
✅ YAML	yamllint	12		0	0	0.97s

See detailed reports in MegaLinter artifacts

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