Add package dependencies system and project settings page

migrations/008_artifact_dependencies.sql

@@ -0,0 +1,48 @@
+-- Migration 008: Artifact Dependencies
+-- Adds support for declaring dependencies between artifacts
+-- Part of Package Dependency Management feature (#76)
+
+-- Create artifact_dependencies table
+CREATE TABLE IF NOT EXISTS artifact_dependencies (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    artifact_id VARCHAR(64) NOT NULL REFERENCES artifacts(id) ON DELETE CASCADE,
+    dependency_project VARCHAR(255) NOT NULL,
+    dependency_package VARCHAR(255) NOT NULL,
+    version_constraint VARCHAR(255),
+    tag_constraint VARCHAR(255),
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+
+    -- Exactly one of version_constraint or tag_constraint must be set
+    CONSTRAINT check_constraint_type CHECK (
+        (version_constraint IS NOT NULL AND tag_constraint IS NULL) OR
+        (version_constraint IS NULL AND tag_constraint IS NOT NULL)
+    ),
+
+    -- Each artifact can only have one dependency on a specific project/package
+    CONSTRAINT unique_artifact_dependency UNIQUE (artifact_id, dependency_project, dependency_package)
+);
+
+-- Index for fast lookups by artifact_id (get all deps for an artifact)
+CREATE INDEX IF NOT EXISTS idx_artifact_dependencies_artifact_id
+    ON artifact_dependencies(artifact_id);
+
+-- Index for reverse dependency lookups (find what depends on a package)
+CREATE INDEX IF NOT EXISTS idx_artifact_dependencies_target
+    ON artifact_dependencies(dependency_project, dependency_package);
+
+-- Index for finding dependencies with specific version constraints
+CREATE INDEX IF NOT EXISTS idx_artifact_dependencies_version
+    ON artifact_dependencies(dependency_project, dependency_package, version_constraint)
+    WHERE version_constraint IS NOT NULL;
+
+-- Index for finding dependencies with specific tag constraints
+CREATE INDEX IF NOT EXISTS idx_artifact_dependencies_tag
+    ON artifact_dependencies(dependency_project, dependency_package, tag_constraint)
+    WHERE tag_constraint IS NOT NULL;
+
+COMMENT ON TABLE artifact_dependencies IS 'Stores dependencies declared by artifacts on other packages';
+COMMENT ON COLUMN artifact_dependencies.artifact_id IS 'The artifact that declares this dependency';
+COMMENT ON COLUMN artifact_dependencies.dependency_project IS 'Project name of the dependency';
+COMMENT ON COLUMN artifact_dependencies.dependency_package IS 'Package name of the dependency';
+COMMENT ON COLUMN artifact_dependencies.version_constraint IS 'Exact version required (mutually exclusive with tag_constraint)';
+COMMENT ON COLUMN artifact_dependencies.tag_constraint IS 'Tag name required (mutually exclusive with version_constraint)';