feat: standardize every project surface as op_pi

[IYENTeam]

Summary

• standardize the public brand, repository, Cargo package, library, binary, CLI, paths, services, schemas, workflows, scripts, docs, fixtures, and filenames on op_pi / OP_PI
• remove former brand compatibility binaries, environment fallbacks, state migration, service aliases, and legacy references because there are no existing users or installations
• rename operational and documentation assets to underscore-based filenames and update every call site
• regenerate signed SNS fixtures and canonicalize GAJAE and telemetry schemas as op_pi

Breaking identity change

• executable and Cargo package: op_pi
• config/state directory: ~/.op_pi
• service: op_pi.service
• telemetry schema: op_pi.telemetry.v1
• repository: IYENTeam/op_pi
• environment variables: OP_PI_*

No prior-brand compatibility or migration path is intentionally retained.

Verification

• cargo fmt --all -- --check
• cargo check --all-targets --locked
• cargo clippy --all-targets --locked -- -D warnings
• cargo test --all-targets --locked -q (694 tests, 0 failed)
• cargo build --release --locked
• cargo package --locked --allow-dirty
• shell syntax and executable checks
• workflow/geobench YAML parsing
• Markdown relative-link validation
• repository-wide canonical identity audit: zero noncanonical brand strings or filenames

Manual QA

• op_pi --help
• op_pi --version
• bad subcommand exits 2
• live daemon health/status and invalid event rejection
• clean temporary-HOME install creates only op_pi and ~/.op_pi

Five independent review lanes (goal, quality, security, hands-on QA, repository context) re-reviewed the fixed tree and returned PASS.