Implement FedSpace & Ranger mechanics (missions, escorts, bounty clearing, ranks)

[rdearman]

Implement canonical FedSpace and Ranger systems.

Parent: #430

Summary:

• Add Federal missions and escort behaviour.
• Implement rules for clearing bounties via Fed.
• Introduce Ranger ranks and advancement rules.
• Fed reactions integrated with alignment and criminal status.

Acceptance criteria:

• New Fed mission endpoints and DB structures.
• Ranger rank display based on XP/alignment.
• Fed behaviour consistent with canonical TW2002.

See epic for canon doc links.