chore: rename cameleer3 to cameleer

Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.

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

.planning/research/ARCHITECTURE.md

@@ -57,7 +57,7 @@ Agents (50+)                        Users / UI
 Agent POST /api/v1/ingest
     |
     v
-[IngestController] -- validates JWT, deserializes using cameleer3-common models
+[IngestController] -- validates JWT, deserializes using cameleer-common models
     |
     v
 [IngestionService.accept(batch)] -- accepts TransactionData/ActivityData
@@ -126,7 +126,7 @@ Each registered SseEmitter sends event to connected agent
 Agent POST /api/v1/diagrams (on startup or route change)
     |
     v
-[DiagramController] -- receives route definition (XML/YAML/JSON from cameleer3-common)
+[DiagramController] -- receives route definition (XML/YAML/JSON from cameleer-common)
     |
     v
 [DiagramService.storeVersion(definition)]
@@ -341,11 +341,11 @@ public record PageCursor(Instant timestamp, String id) {}
 
 ## Module Boundary Design
 
-### Core Module (`cameleer3-server-core`)
+### Core Module (`cameleer-server-core`)
 
 The core module is the domain layer. It contains:
 
-- **Domain models** -- Transaction, Activity, Agent, DiagramVersion, etc. (may extend or complement cameleer3-common models)
+- **Domain models** -- Transaction, Activity, Agent, DiagramVersion, etc. (may extend or complement cameleer-common models)
 - **Service interfaces and implementations** -- TransactionService, AgentRegistryService, DiagramService, QueryEngine
 - **Repository interfaces** -- TransactionRepository, DiagramRepository, AgentRepository (interfaces only, no implementations)
 - **Ingestion logic** -- WriteBuffer, batch assembly, backpressure signaling
@@ -356,7 +356,7 @@ The core module is the domain layer. It contains:
 
 **No Spring Boot dependencies.** Jackson is acceptable (already present). JUnit for tests.
 
-### App Module (`cameleer3-server-app`)
+### App Module (`cameleer-server-app`)
 
 The app module is the infrastructure/adapter layer. It contains:
 
@@ -376,8 +376,8 @@ The app module is the infrastructure/adapter layer. It contains:
 ```
 app --> core (allowed)
 core --> app (NEVER)
-core --> cameleer3-common (allowed)
-app --> cameleer3-common (transitively via core)
+core --> cameleer-common (allowed)
+app --> cameleer-common (transitively via core)
 ```
 
 ## Ingestion Pipeline Detail
@@ -393,7 +393,7 @@ Use a two-stage approach:
 
 - WriteBuffer has a bounded capacity (configurable, default 50,000 items).
 - When buffer is >80% full, respond with HTTP 429 + `Retry-After` header.
-- Agents (cameleer3) should implement exponential backoff on 429.
+- Agents (cameleer) should implement exponential backoff on 429.
 - Monitor buffer fill level as a metric.
 
 ### Batch Size Tuning