TRITON-2542 Add support for ed25519 keys

[travispaul]

While running tests and the examples, I encountered a few other bugs:

• UpdateConfig should use PUT not POST
• Directory Force Delete #155
• authentication: fix dropped marshal errors #204
• Cherry-picked the fix from: examples/compute/create_instance_with_volumes: fix unit tests #205
• Manta examples should use MANTA_ env vars
• Image tags can have booleans, strings, or numbers as values.

I also removed deprecated govvv and dep tools, go now natively supports what they offered.

I am very slightly concerned someone might be relying on the current deleteAll behavior, it is broken and will only delete the first object in a directory and stop, now it actually deletes all objects in the directory and all directories if ForceDelete is true (Just like mrm -r.) However, I'm also not sure how the current broken behavior would be at all useful so I might be overthinking it. That being said, I'm open to backing out that change and addressing it separately.

Testing notes on ticket.

Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com

[Copilot]

Pull request overview

This PR expands the authentication layer to support Ed25519 keys (both private-key signing and SSH-agent signing), fixes recursive directory force-delete behavior in storage, and aligns several examples/tests with corrected APIs and environment variables.

Changes:

• Add Ed25519 support across authentication fingerprinting and signing, including SSH-agent signatures and new unit tests.
• Fix ForceDelete directory deletion to fully recurse and delete all children; add storage tests to prevent regressions.
• Correct UpdateConfig to use HTTP PUT and update examples to prefer MANTA_ environment variables.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
authentication/util.go	Extends fingerprint formatting to handle Ed25519 private keys (and raw ssh.PublicKey).
authentication/private_key_signer.go	Adds Ed25519 signing support and refactors Sign() to reuse SignRaw().
authentication/ssh_agent_signer.go	Adds Ed25519 SSH-agent signature handling and simplifies error wrapping import usage.
authentication/ed25519_signature.go	Introduces an Ed25519 signature wrapper for HTTP Signature formatting.
authentication/authentication_test.go	Adds coverage for Ed25519 fingerprinting/signing and keyFormatToKeyType() behavior.
storage/directory.go	Fixes ForceDelete recursion to delete all objects/subdirectories instead of returning early.
storage/delete_test.go	Adds tests validating multi-object and nested-directory force delete behavior.
account/config.go	Fixes UpdateConfig request method from POST to PUT.
account/config_test.go	Updates tests to expect PUT for config update requests.
examples/storage/sign_url/main.go	Switches storage example env vars to prefer MANTA_* and MANTA_URL.
examples/storage/object_put/main.go	Switches storage example env vars to prefer MANTA_* and MANTA_URL.
examples/storage/mls/main.go	Switches storage example env vars to prefer MANTA_* and MANTA_URL.
examples/storage/create_mpu/main.go	Switches storage example env vars to prefer MANTA_*.
examples/storage/create_job/main.go	Switches storage example env vars to prefer MANTA_* and MANTA_URL.
examples/storage/force_delete/main.go	Adds a required MANTA_FOLDER validation check.
examples/compute/create_instance_with_volumes/main.go	Fixes example tags typing to match expected map[string]interface{}.
examples/services/templates/list_templates.go	Adds clarification note that TSG targets a separate API server, not CloudAPI.
examples/services/groups/list_groups.go	Adds clarification note that TSG targets a separate API server, not CloudAPI.

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[Copilot]

Pull request overview

Copilot reviewed 29 out of 29 changed files in this pull request and generated 1 comment.

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