Read encryption key from environment variable and base64 decode it for CIFS

[SimoneBendazzoli93]

Requested Enhancement:

Edit MAIA/maia_admin.py at lines 439-440 to change how the CIFS encryption key is provided:

• Instead of passing an empty string as the publicKey value, read the encryption key from an environment variable.
• Base64 decode the environment variable value and pass it as the encryption publicKey in the maia_namespace_values["cifs"] dictionary.

Suggested Implementation:

• Read the encryption key from an environment variable (e.g., CIFS_ENCRYPTION_KEY).
• Decode the value using base64.b64decode().
• Pass the decoded value as publicKey in the config.

Relevant code location:

• File: MAIA/maia_admin.py
• Lines: 439-440

Acceptance Criteria:

• The encryption key should be securely loaded and decoded at runtime for deployment.
• The value should not be hardcoded or left empty.
• Implementation must handle cases where the environment variable is missing or invalid (e.g., log an error or fallback appropriately).

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Reference: Source file