* fix(sync): always bind column value parameters in merge_insert_col

Fix parameter binding bug in merge_insert_col that caused SQLite-to-PostgreSQL sync to fail with "there is no parameter $3" when NULL values were synced before non-NULL values for the same column.

* fix(network): fix the value of the seq variable in cloudsync_payload_get when the last db_version is not related to a local change

* test(postgres): new test for null value

* fix(postgres): ensure NULL values use consistent decoded types for SPI plan caching

When syncing NULL values first, PostgreSQL's SPI caches the prepared plan with the NULL's type. If a subsequent non-NULL value decodes to a different type, the plan fails. The fix maps column types to their decoded equivalents so NULL and non-NULL values always use consistent types (e.g., all integers use INT8OID, all floats use FLOAT8OID, most others use TEXTOID).

Add map_column_oid_to_decoded_oid() to map column types to their decoded equivalents (INT2/4/8 → INT8, FLOAT4/8/NUMERIC → FLOAT8, BYTEA → BYTEA, others → TEXT). This ensures NULL and non-NULL values bind with the same type, preventing "there is no parameter $N" errors when NULL is synced before non-NULL values for the same column.

Add tests 23 and 24 for UUID columns and comprehensive nullable type coverage (INT2/4/8, FLOAT4/8, NUMERIC, BYTEA, TEXT, VARCHAR, CHAR, UUID, JSON, JSONB, DATE, TIMESTAMP).

* fix(postgres): add bigint to boolean cast for BOOLEAN column sync

BOOLEAN values are encoded as INT8 in sync payloads for SQLite interoperability, but PostgreSQL has no built-in cast from bigint to boolean. Add a custom ASSIGNMENT cast that enables BOOLEAN columns to sync correctly.

The cast uses ASSIGNMENT context (not IMPLICIT) to avoid unintended conversions in WHERE clauses while still enabling INSERT/UPDATE operations used by merge_insert.

The write direction (BOOL → INT encoding flow) "just works" because DatumGetBool() naturally returns 0 or 1. The problem was only on the read side where PostgreSQL refused to cast the decoded INT8 back to BOOLEAN without our custom cast.

* feat(commands): add sync roundtrip RLS test guide

* bump version

* ci: add postgres-test job to main workflow

* ci(Makefile.postgresql): replaced all docker-compose commands with docker compose (v2 plugin syntax)

Fix the execution in the github actions runner: The GitHub Actions runner has docker compose (v2 plugin) but not the standalone docker-compose (v1)

* ci: fix the "run postgresql tests" step

…sion is satisfied (#7)

* Added the ability to perform a perform a sync only if a column expression is satisfied

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Co-authored-by: Marco Bambini <marco@creolabs.com>