FileStor capabilities / threats./ controls

[robmoffat]

This pull request introduces a new managed file storage catalog to the CCC framework, including its metadata, capabilities, and controls. It also extends the CCC Core catalog with new observability and resource protection controls, and updates threat mappings. The most important changes are summarized below.

New Managed File Storage Catalog

• Added CCC.FileStor managed file storage catalog, including metadata, capabilities (such as managed file systems, NFS access, POSIX semantics, durability, and quotas), and detailed security and operational controls. [1] [2] [3]

Enhancements to CCC Core Catalog

• Added new controls in the CCC Core catalog for observability and resource protection, including validation of alert/event publication, protection of runtime metrics, restriction of state-change event access, prevention of unauthorized tag modification, and restriction of snapshot/replica access.

Threat and Reference Updates

• Updated threat mappings in the CCC Core catalog, including correcting and expanding threat references for encryption key misuse and publication threats. [1] [2]

Cross-Catalog Integration

• Mapped file storage catalog controls and capabilities to relevant CCC Core controls and threats using imports blocks, ensuring consistency and traceability across the catalogs. [1] [2]

Documentation and Metadata

• Provided comprehensive metadata for the new file storage catalog, including versioning, service examples, and mapping references to industry standards such as MITRE ATT&CK and D3FEND.

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