Resolve company-context merge with agent invites

[G9Pedro]

Summary

• Merge latest origin/main into the agent onboarding/invite branch.
• Classified all surfaced conflicts as simple additive/structural conflicts:
  • README kept both agent onboarding docs and company-context browsing docs.
  • wg-cli manifest kept the required wg-graph dependency plus versioned internal deps.
  • onboard.rs kept compatibility with expanded company-context actor fields.
  • output/human.rs kept both graph-reference and invite/onboard imports.
• No complicated/conflicting product intents were found.

Verification

• cargo fmt --all --check
• cargo clippy --workspace --all-targets --all-features -- -D warnings
• cargo test --workspace
• Focused smoke: workgraph onboard ... --agent agent:pedro-openclaw=openclaw --agent agent:pedro-hermes=hermes --json
• Focused smoke: workgraph invite create --label openclaw --actor-id agent:pedro-openclaw --server http://127.0.0.1:8787 --json
• Focused smoke: workgraph actor register --type person --id person:ada --title Ada --role Engineer --team-id team/platform --json
• Focused smoke: workgraph query person --filter team_ids=team/platform --json
• Focused smoke: workgraph show person/person:ada --json