fix(security): require configured TMDB API key instead of hardcoded default

[JonahMMay]

Problem

Addresses OWASP A02/A07 finding: a shared TMDB API key was hardcoded in the plugin binary/source.

Approach

• Remove the embedded default key
• Require an operator-configured api_key via plugin global config (or TMDB_API_KEY for bootstrap/tests)
• Fail clearly when no key is configured

Testing

go test ./...

AI Disclosure

• Tool(s): Cursor Cloud Agent
• Model(s): Composer
• Involvement: Implemented from OWASP audit findings
• Adversarial review: Confirmed no residual hardcoded key remains and Configure/env paths cover production + tests

Checklist

• Adversarial review completed
• go test ./... passed

  

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 6e1ac05e-1086-4025-b271-12c1d5c9bbcb

📥 Commits

Reviewing files that changed from the base of the PR and between 2cf7e92 and 0a1a6df.

📒 Files selected for processing (7)

• main.go
• main_test.go
• manifest.json
• provider/client.go
• provider/client_test.go
• provider/provider.go
• provider/provider_test.go

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cursor/remove-hardcoded-tmdb-key-83ad

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