chore: Dockerfile, README, LICENSE, .env.example, CI workflows (lint/test/deploy)

Dockerfile

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+# ----- build -----
+FROM rust:slim-bookworm AS builder
+
+WORKDIR /build
+
+# Cache dependency compilation separately from source
+COPY Cargo.toml Cargo.lock ./
+COPY crates/adapters/activitypub/Cargo.toml       crates/adapters/activitypub/Cargo.toml
+COPY crates/adapters/activitypub-base/Cargo.toml  crates/adapters/activitypub-base/Cargo.toml
+COPY crates/adapters/auth/Cargo.toml              crates/adapters/auth/Cargo.toml
+COPY crates/adapters/event-payload/Cargo.toml     crates/adapters/event-payload/Cargo.toml
+COPY crates/adapters/event-transport/Cargo.toml   crates/adapters/event-transport/Cargo.toml
+COPY crates/adapters/nats/Cargo.toml              crates/adapters/nats/Cargo.toml
+COPY crates/adapters/postgres/Cargo.toml          crates/adapters/postgres/Cargo.toml
+COPY crates/adapters/postgres-federation/Cargo.toml crates/adapters/postgres-federation/Cargo.toml
+COPY crates/adapters/postgres-search/Cargo.toml   crates/adapters/postgres-search/Cargo.toml
+COPY crates/api-types/Cargo.toml                  crates/api-types/Cargo.toml
+COPY crates/application/Cargo.toml                crates/application/Cargo.toml
+COPY crates/bootstrap/Cargo.toml                  crates/bootstrap/Cargo.toml
+COPY crates/domain/Cargo.toml                     crates/domain/Cargo.toml
+COPY crates/presentation/Cargo.toml               crates/presentation/Cargo.toml
+COPY crates/worker/Cargo.toml                     crates/worker/Cargo.toml
+
+# Stub every crate so cargo can resolve and fetch deps without real source
+RUN find crates -name "Cargo.toml" | sed 's|/Cargo.toml||' | \
+    xargs -I{} sh -c 'mkdir -p {}/src && echo "fn main(){}" > {}/src/main.rs && echo "" > {}/src/lib.rs'
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    pkg-config \
+    libssl-dev \
+ && rm -rf /var/lib/apt/lists/*
+
+RUN cargo fetch
+
+# Now copy real source and build
+COPY crates ./crates
+
+RUN cargo build --release -p bootstrap -p worker
+
+# ----- runtime -----
+FROM debian:bookworm-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
+    libssl3 \
+    wget \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY --from=builder /build/target/release/thoughts        ./thoughts
+COPY --from=builder /build/target/release/thoughts-worker ./thoughts-worker
+
+EXPOSE 3000
+
+ENV RUST_LOG=info
+
+CMD ["./thoughts"]