Changed camelCase NSIDs to lowercase to comply with atProto Lexicon
specification which requires NSIDs to use only lowercase letters:
- social.coves.actor.getProfile → social.coves.actor.getprofile
- social.coves.actor.updateProfile → social.coves.actor.updateprofile

Updated all code references including routes, tests, and documentation.

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Co-Authored-By: Claude <noreply@anthropic.com>

- Apply gofumpt formatting with extra-rules across all packages
- Fix mock interface signatures to match updated Service/Repository interfaces
- Fix ineffassign bugs in community_repo.go (sortColumn/sortOrder)
- Fix unchecked error returns in production code (register.go)
- Fix unchecked error returns in test files (defer closures)
- Optimize struct field alignment per govet fieldalignment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Standardize import ordering and formatting using gofumpt.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Add configurable allowlist to restrict who can create communities during alpha.
Self-hosters can set their own DID in the env var.

- Add allowedCommunityCreators field to CreateHandler
- Load comma-separated DIDs from COMMUNITY_CREATORS env var
- Return 403 CommunityCreationRestricted for non-allowed users
- Empty/unset env var allows all authenticated users
- Filter empty strings from allowlist defensively
- Add comprehensive unit tests for allowlist behavior

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Co-Authored-By: Claude <noreply@anthropic.com>