docs: update for log forwarding v2 (source field, wire format)

HOWTO.md: log ingestion example updated from LogBatch wrapper to raw
JSON array with source field. CLAUDE.md: added LogIngestionController,
updated LogQueryController with new filters. SERVER-CAPABILITIES.md:
updated log ingestion and query descriptions, ClickHouse table note.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -85,7 +85,8 @@ java -jar cameleer3-server-app/target/cameleer3-server-app-1.0-SNAPSHOT.jar
 - `EnvironmentAdminController` — CRUD /api/v1/admin/environments, PUT /{id}/jar-retention
 - `ExecutionController` — GET /api/v1/executions (search + detail)
 - `SearchController` — POST /api/v1/search, GET /routes, GET /top-errors, GET /punchcard
-- `LogQueryController` — GET /api/v1/logs, GET /tail
+- `LogQueryController` — GET /api/v1/logs (filters: source, application, agentId, exchangeId, level, logger, q, environment, time range)
+- `LogIngestionController` — POST /api/v1/data/logs (accepts `List<LogEntry>` JSON array, each entry has `source`: app/agent)
 - `ChunkIngestionController` — POST /api/v1/ingestion/chunk/{executions|metrics|diagrams}
 - `UserAdminController` — CRUD /api/v1/admin/users, POST /{id}/roles, POST /{id}/set-password
 - `RoleAdminController` — CRUD /api/v1/admin/roles